Cryptarithmetic Puzzles for 2023, Puzzle #20 SIXTH + SIXTH = THIRD

Having trouble with fractions? Well, this one is true: SIXTH + SIXTH = THIRD

Solutions are below the image.

SPOILER SOLUTIONS!

SIXTH_first SIXTH_second THIRD_third
14729 14729 29458
18436 18436 36872
27354 27354 54708
29458 29458 58916
39478 39478 78956
43186 43186 86372
45791 45791 91582