For Loop that increases a value inserted into a mysql table
===

I am trying to increase a value of the last entry inserted into a MySQL table by x%, then inserting that value into the database and continuing until the loop ends, starting with the base value of 100.

Let's say I start with the base value of 100 on row number one, and I would like to increase the value by 25%. In row number two, I would like 100 increased by 25%. In row number three, the value in row number two increased by 25%, etc, the loop stops when it reaches 100. How can this happen?

    $base_value = 100;
    $increase_by; // x percent

    for($i = 1; $i = 100; $i++)
    {
        mysql_query("insert into table values(
           '',
           '$i',
           ''
        )");
    }