Home / 129,400-278,672

Finding the Third Proportional to 129,400 and 278,672

Calculator

Solution

The third proportional to 129,400 and 278,672 is: 600,139.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,400 : 278,672 = 278,672 : x
  2. Step 2: Convert to fraction form
    129,400/278,672 = 278,672/x
  3. Step 3: Cross multiply
    129,400x = 278,672 × 278,672
  4. Step 4: Simplify right side
    129,400x = 77,658,083,584
  5. Step 5: Solve for x
    x = 77,658,083,584/129,400
  6. Step 6: Final answer
    x = 600,139.75

Related Problems

Find third proportional to 64,700 and 139,336
Half scale
Find third proportional to 258,800 and 557,344
Double scale
Find third proportional to 129,402 and 278,676
Similar ratio
Find third proportional to 194,100 and 418,008
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.