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Finding the Fourth Proportional to 129,154.59, 178,233.21 and 71,792.10

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Solution

The fourth proportional to 129,154.59, 178,233.21 and 71,792.10 is: 99,073.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,154.59 : 178,233.21 = 71,792.10 : x
  2. Step 2: Convert to fraction form
    129,154.59/178,233.21 = 71,792.10/x
  3. Step 3: Cross multiply
    129,154.59x = 178,233.21 × 71,792.10
  4. Step 4: Simplify right side
    129,154.59x = 12,795,736,435.64
  5. Step 5: Solve for x
    x = 12,795,736,435.64/129,154.59
  6. Step 6: Final answer
    x = 99,073.03

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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.