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.
[[-108, -68, -114, -31, -62, -74, -5], [13, 94, -118], [-126, -1, -134, -40, -58, -134], [-181, 54, 89, -129, 83, 90]]