Home / 66,616-139,389

Finding the Third Proportional to 66,616 and 139,389

Calculator

Solution

The third proportional to 66,616 and 139,389 is: 291,661.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,616 : 139,389 = 139,389 : x
  2. Step 2: Convert to fraction form
    66,616/139,389 = 139,389/x
  3. Step 3: Cross multiply
    66,616x = 139,389 × 139,389
  4. Step 4: Simplify right side
    66,616x = 19,429,293,321
  5. Step 5: Solve for x
    x = 19,429,293,321/66,616
  6. Step 6: Final answer
    x = 291,661.06

Related Problems

Find third proportional to 33,308 and 69,694.50
Half scale
Find third proportional to 133,232 and 278,778
Double scale
Find third proportional to 66,618 and 139,393
Similar ratio
Find third proportional to 99,924 and 209,083.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.