Home / 129,516.84-178,732.17-72,155.61

Finding the Fourth Proportional to 129,516.84, 178,732.17 and 72,155.61

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Solution

The fourth proportional to 129,516.84, 178,732.17 and 72,155.61 is: 99,574.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,516.84 : 178,732.17 = 72,155.61 : x
  2. Step 2: Convert to fraction form
    129,516.84/178,732.17 = 72,155.61/x
  3. Step 3: Cross multiply
    129,516.84x = 178,732.17 × 72,155.61
  4. Step 4: Simplify right side
    129,516.84x = 12,896,528,752.97
  5. Step 5: Solve for x
    x = 12,896,528,752.97/129,516.84
  6. Step 6: Final answer
    x = 99,574.15

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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.