Salutations!
Round 73,569 ten thousands
So lets round this!
73, 369 rounded to nearest ten thousands. Look at the number 3. To make things logical, you need to know the number next to 7 is greater than 5 or lesser than 5. If it were greater than 5, you need add + 1 in the ten thousands place, and add zeros accordingly.
But in this case, the number next to 7 is lesser than 5. We would just add the zeros accordingly.
→ 73,569 ≈ 70,000.
Hope I helped :D
