Home / 129,306.24-178,441.92-72,716.40

Finding the Fourth Proportional to 129,306.24, 178,441.92 and 72,716.40

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Solution

The fourth proportional to 129,306.24, 178,441.92 and 72,716.40 is: 100,348.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,306.24 : 178,441.92 = 72,716.40 : x
  2. Step 2: Convert to fraction form
    129,306.24/178,441.92 = 72,716.40/x
  3. Step 3: Cross multiply
    129,306.24x = 178,441.92 × 72,716.40
  4. Step 4: Simplify right side
    129,306.24x = 12,975,654,031.49
  5. Step 5: Solve for x
    x = 12,975,654,031.49/129,306.24
  6. Step 6: Final answer
    x = 100,348.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.