Home / 66,610-139,378

Finding the Third Proportional to 66,610 and 139,378

Calculator

Solution

The third proportional to 66,610 and 139,378 is: 291,641.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,610 : 139,378 = 139,378 : x
  2. Step 2: Convert to fraction form
    66,610/139,378 = 139,378/x
  3. Step 3: Cross multiply
    66,610x = 139,378 × 139,378
  4. Step 4: Simplify right side
    66,610x = 19,426,226,884
  5. Step 5: Solve for x
    x = 19,426,226,884/66,610
  6. Step 6: Final answer
    x = 291,641.30

Related Problems

Find third proportional to 33,305 and 69,689
Half scale
Find third proportional to 133,220 and 278,756
Double scale
Find third proportional to 66,612 and 139,382
Similar ratio
Find third proportional to 99,915 and 209,067
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.