Home / 129,089.46-178,124.13-72,489.90

Finding the Fourth Proportional to 129,089.46, 178,124.13 and 72,489.90

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Solution

The fourth proportional to 129,089.46, 178,124.13 and 72,489.90 is: 100,025.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,089.46 : 178,124.13 = 72,489.90 : x
  2. Step 2: Convert to fraction form
    129,089.46/178,124.13 = 72,489.90/x
  3. Step 3: Cross multiply
    129,089.46x = 178,124.13 × 72,489.90
  4. Step 4: Simplify right side
    129,089.46x = 12,912,200,371.29
  5. Step 5: Solve for x
    x = 12,912,200,371.29/129,089.46
  6. Step 6: Final answer
    x = 100,025.21

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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.