In this task, you are given a list. This list contains many lists of integers. The list is several items written within a []. Your task is to find the maximum number among the members of each inner list. The output should be a list comprised of the maximums with the same order as the internal lists.
[[-139, -47, -107, -153], [-158, 58, -18], [57, 24, 4, -199, -51, -48, 17], [-156, 22, 83, -45]]