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Finding the Fourth Proportional to 129,200.96, 178,275.65 and 71,838.65

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Solution

The fourth proportional to 129,200.96, 178,275.65 and 71,838.65 is: 99,125.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,200.96 : 178,275.65 = 71,838.65 : x
  2. Step 2: Convert to fraction form
    129,200.96/178,275.65 = 71,838.65/x
  3. Step 3: Cross multiply
    129,200.96x = 178,275.65 × 71,838.65
  4. Step 4: Simplify right side
    129,200.96x = 12,807,080,773.30
  5. Step 5: Solve for x
    x = 12,807,080,773.30/129,200.96
  6. Step 6: Final answer
    x = 99,125.28

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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.