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Finding the Fourth Proportional to 129,337.52, 178,484.48 and 71,975.86

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Solution

The fourth proportional to 129,337.52, 178,484.48 and 71,975.86 is: 99,325.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,337.52 : 178,484.48 = 71,975.86 : x
  2. Step 2: Convert to fraction form
    129,337.52/178,484.48 = 71,975.86/x
  3. Step 3: Cross multiply
    129,337.52x = 178,484.48 × 71,975.86
  4. Step 4: Simplify right side
    129,337.52x = 12,846,573,944.65
  5. Step 5: Solve for x
    x = 12,846,573,944.65/129,337.52
  6. Step 6: Final answer
    x = 99,325.96

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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.