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.
[[-153, -42, -80], [4, 30], [87, -57, -137, -85, -188, -158], [-89, -68, -173, 34]]