DC-DC Forward convertor

Hello everybody,

I wanna design to a forward convertor with these spec;

Input Voltage= 50 to 150 V
Input Power= 75 W
i desired to efficency 0.8
so my output power= 60 W @12V, @5Amper
f=50kHz
there is my calculations for turn ratio and output inductor;
calculating

and i used turn ratio 1.5/1

Vout=dutycycle*inputvoltage*ratio of transformer
12=duty*150*1.5 @150V minimum duty cycle=0.053

question 1) why my output voltage and current aren't proper my calculatings
question 2) why input current flow from input voltage source is too high

my LTspice model and output waves in attachments;