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.
[[-181, -16, -23], [-167, 90], [-171, -166, -80, -138, -71, 88, -31], [-171, -68], [-41, -131, -39, -54]]