Home / 129,918-279,172

Finding the Third Proportional to 129,918 and 279,172

Calculator

Solution

The third proportional to 129,918 and 279,172 is: 599,893.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,918 : 279,172 = 279,172 : x
  2. Step 2: Convert to fraction form
    129,918/279,172 = 279,172/x
  3. Step 3: Cross multiply
    129,918x = 279,172 × 279,172
  4. Step 4: Simplify right side
    129,918x = 77,937,005,584
  5. Step 5: Solve for x
    x = 77,937,005,584/129,918
  6. Step 6: Final answer
    x = 599,893.82

Related Problems

Find third proportional to 64,959 and 139,586
Half scale
Find third proportional to 259,836 and 558,344
Double scale
Find third proportional to 129,920 and 279,176
Similar ratio
Find third proportional to 194,877 and 418,758
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.