According to my math Ohio State's magic number is 30. They need Iowa to miss out on possible points (losing a match or not getting bonus points) or score points themselves totalling 30 to clinch the title.
Current Possible Points Left Max Total
OSU 86.5 35 121.5
Iowa 73 43 116
Cornel 66.5 29 95.5
Edinboro 64.5 29 93.5