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Finding the Fourth Proportional to 129,658.52, 178,927.80 and 73,088.12

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Solution

The fourth proportional to 129,658.52, 178,927.80 and 73,088.12 is: 100,861.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,658.52 : 178,927.80 = 73,088.12 : x
  2. Step 2: Convert to fraction form
    129,658.52/178,927.80 = 73,088.12/x
  3. Step 3: Cross multiply
    129,658.52x = 178,927.80 × 73,088.12
  4. Step 4: Simplify right side
    129,658.52x = 13,077,496,517.74
  5. Step 5: Solve for x
    x = 13,077,496,517.74/129,658.52
  6. Step 6: Final answer
    x = 100,861.07

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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.