The 15 most populous states in the United State have an average population of 141.51 million, with a standard deviation of 87.49 million, Virginia and Washington have populations of 83.83 Million and 71.70 Million, respectively. Texas and Pennsylvania have z-scores of 1.52 and 0.15, respectively. List these four states in order from smallest to largest populations. Mathematically explain your reasoning and be sure to include all necessary calculations.