Carson Hansen’s 3-yard touchdown run with 1:31 left Saturday night lifted No. 22 Iowa State to a 31-28 win over Utah in Salt Lake City, forcing a four-way tie for the Big 12 Conference lead with one week left in the regular season.Hansen’s score capped a 75-yard drive for the Cyclones (9-2, 6-2). His halfback pass to Gabe Burkle on third and 1 on the previous play went for 26 yard to set up his winning score.The Utes (4-7, 1-7) had a chance to force overtime but Cole Becker, who earlier made field goals of 34 and 47 yards, missed wide right on a 54-yard attempt with nine seconds left. Utah reached the 33-yard line earlier in the drive but backup quarterback Luke Bottari was flagged for intentional grounding, backing it up just far enough to affect the field-goal try.Rocco Becht completed 20 of 38 passes for 256 yards with a touchdown and an interception for Iowa State, which hosts Kansas State next week. The Cyclones are tied with Arizona State, BYU and Colorado atop the conference.Bottari hit 5 of 9 passes for 55 yards for Utah in relief of starter Isaac Wilson, who was 8 of 8 for 74 yards before suffering a leg injury in the third quarter.Looking to stay bowl-eligible after being picked to win the conference in preseason polls, Utah initiated scoring at the 9:52 mark of the first quarter as Becker finished its opening drive with the 34-yard field goal.