Home / 129,397.47-178,568.13-72,808.85

Finding the Fourth Proportional to 129,397.47, 178,568.13 and 72,808.85

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Solution

The fourth proportional to 129,397.47, 178,568.13 and 72,808.85 is: 100,475.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,397.47 : 178,568.13 = 72,808.85 : x
  2. Step 2: Convert to fraction form
    129,397.47/178,568.13 = 72,808.85/x
  3. Step 3: Cross multiply
    129,397.47x = 178,568.13 × 72,808.85
  4. Step 4: Simplify right side
    129,397.47x = 13,001,339,299.11
  5. Step 5: Solve for x
    x = 13,001,339,299.11/129,397.47
  6. Step 6: Final answer
    x = 100,475.99

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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.