Very unlikely. One of Mr. Satan's ways to show off his "tremendous" strength, is by breaking 14 bricks. In the second DB manga however, Goku smashes three bricks with one finger, without any effort at all. So obviously, Goku as a kid, was much more stronger than Mr. Satan at his peak. Considering Goku had a power level of 300 at the beginning of DBZ, it's practically impossible for Mr. Satan to have a power level of 100.