Starks hit 8-of-12 shots, including three from 3-point range, to go along with Porter's 19 points and 14 rebounds for the Hoyas (17-4, 7-3 Big East), who won their fifth consecutive game.
The loss extended Rutgers' (12-10, 3-8) losing streak to six games.
Eli Carter, with 23 points, was the only Rutgers player in double figures.
The score was tied 33-33 at halftime. Rutgers trailed 62-61 with 1:28 to play in the second half, but only scored one field goal the rest of the way while Georgetown's Porter racked up seven points.
Gal Gadot cast as Wonder Woman for 'Batman vs. Superman'
Couple mistakenly served bag of cash at McDonald's drive-thru