You have mixed up the behavior of sinewave driven transformers with switch-mode transformers. The two are very different.
In an sinewave transformer, the rectified secondary is 1.4 times the RMS voltrage. Secondary RMS voltage will be the input voltage times the transformer turns ratio.
In a switch-mode transformer, that is usually not the case, but will depend on many things, starting with the type of converter.
For a flyback converter, the rectified secondary voltage will be equal to the peak secondary voltage. (less the diode drop) The input to output voltage is not dependent on the primary to secondary turns ratio. You can however, have multiple secondaries and their voltage ratio DOES follow their respective turns ratio.
For a forward converter, the rectified secondary will be less than the secondary peak voltage, but how much is determined by many factors, including turns ratio, duty cycle, output coil inductance, etc. Multiple secondaries can be added, and are also turns ratio dependent, but will track ONLY if they share the same output inductor, and the turns ratio on the output inductor matches.