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.
[[86, 7, 31, -172], [-115, -107, -45, -197], [-183, -25, -107, -48, -43], [-130, -138, 16, 83, -9]]