Home / 129,672.20-194,508.30-80,999.30

Finding the Fourth Proportional to 129,672.20, 194,508.30 and 80,999.30

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Solution

The fourth proportional to 129,672.20, 194,508.30 and 80,999.30 is: 121,498.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,672.20 : 194,508.30 = 80,999.30 : x
  2. Step 2: Convert to fraction form
    129,672.20/194,508.30 = 80,999.30/x
  3. Step 3: Cross multiply
    129,672.20x = 194,508.30 × 80,999.30
  4. Step 4: Simplify right side
    129,672.20x = 15,755,036,144.19
  5. Step 5: Solve for x
    x = 15,755,036,144.19/129,672.20
  6. Step 6: Final answer
    x = 121,498.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.