That 3rd and 4th hop is killing your ping , i looked up the whois info for you and it looks like thats where your handed off to sprint . your 2nd hop from youngstown OH goes to Winter Park, Florida then back to pittsburgh PA and thats where you get that 90ms jump , i would call your isp and complain , looks like their routing is screwy . I looked up whois info from 
http://www.DNSstuff.com , maybe their info is bad , but with that high of a  ms spike there i would believe it.
WHOIS results for 71.53.56.1
Generated by 
http://www.DNSstuff.comLocation: United States [City: Youngstown, Ohio]
Using 0 day old cached answer (or, you can get fresh results).
Hiding E-mail address (you can get results with the E-mail address).
OrgName:    Embarq Corporation 
OrgID:      EMBAR
Address:    500 N New York Ave
City:       Winter Park
StateProv:  FL
PostalCode: 32789
Country:    US
NetRange:   71.48.0.0 - 71.55.255.255 
CIDR:       71.48.0.0/13 
NetName:    EMBARQ-GLOBAL
NetHandle:  NET-71-48-0-0-1
Parent:     NET-71-0-0-0-0
NetType:    Direct Allocation
NameServer: NS9.EMBARQSERVICES.NET
NameServer: NS10.EMBARQSERVICES.NET
Comment:    
RegDate:    2005-04-26
Updated:    2007-02-22
OrgTechHandle: ESC36-ARIN
OrgTechName:   Embarq Services - CDS 
OrgTechPhone:  +1-407-741-0500
OrgTechEmail:  *********@embarqservices.net
# ARIN WHOIS database, last updated 2007-04-06 19:10
# Enter ? for additional hints on searching ARIN's WHOIS database. 
WHOIS results for 205.244.194.89
Generated by 
http://www.DNSstuff.comLocation: United States [City: Winter Park, Florida]
Using 0 day old cached answer (or, you can get fresh results).
Hiding E-mail address (you can get results with the E-mail address).
Sprint SPRINT-BLKF (NET-205-240-0-0-1) 
                                  205.240.0.0 - 205.247.255.255
Sprint DSL Network DSL-NET003-LV (NET-205-244-194-0-1) 
                                  205.244.194.0 - 205.244.194.255
# ARIN WHOIS database, last updated 2007-04-06 19:10
# Enter ? for additional hints on searching ARIN's WHOIS database. 
WHOIS results for 160.81.255.93
Generated by 
http://www.DNSstuff.comLocation: United States [City: Pittsburgh, Pennsylvania]
OrgName:    Sprint 
OrgID:      SPRN
Address:    12502 Sunrise Valley Drive
City:       Reston
StateProv:  VA
PostalCode: 20196
Country:    US
NetRange:   160.81.0.0 - 160.81.255.255 
CIDR:       160.81.0.0/16 
NetName:    SPRN-BLKI
NetHandle:  NET-160-81-0-0-1
Parent:     NET-160-0-0-0-0
NetType:    Direct Allocation
NameServer: NS1-AUTH.SPRINTLINK.NET
NameServer: NS2-AUTH.SPRINTLINK.NET
NameServer: NS3-AUTH.SPRINTLINK.NET
Comment:    
RegDate:    1992-04-28
Updated:    2005-03-02
RTechHandle: SPRINT-NOC-ARIN
RTechName:   Sprintlink (Sprint) 
RTechPhone:  +1-800-232-6895
RTechEmail:  ***@sprint.net 
OrgTechHandle: ARINS-ARIN
OrgTechName:   arin-sprint-iprequest 
OrgTechPhone:  +1-800-232-3458
OrgTechEmail:  ******@sprint.net
# ARIN WHOIS database, last updated 2007-04-06 19:10
# Enter ? for additional hints on searching ARIN's WHOIS database.