1. A computer-implemented method, comprising: forming, on a computing device, hierarchies having components that include a numerator time series with values from input data, a denominator time series with values from the input data, and a ratio time series of the numerator time series over the denominator time series; modeling, with the computing device, the components to generate forecasted hierarchies; and reconciling the forecasted hierarchies so that the forecasted hierarchies are statistically consistent throughout nodes of the forecasted hierarchies.