Cherilus was taken 17th, Baker 21st, Brown 26th, and Rachal 39th. Some of those were projected in the 3rd round. So with those off the board, the Bears filled what they felt was their 2nd biggest need with Forte. Forte was the 6th RB taken.
At 44, the options were 10th OL, 6th RB, 6th WR, or 3rd QB. Obviously they felt that filling the RB need was the best value at that pick.