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Finding the Fourth Proportional to 129,591.28, 178,835.17 and 73,020.88

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Solution

The fourth proportional to 129,591.28, 178,835.17 and 73,020.88 is: 100,768.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,591.28 : 178,835.17 = 73,020.88 : x
  2. Step 2: Convert to fraction form
    129,591.28/178,835.17 = 73,020.88/x
  3. Step 3: Cross multiply
    129,591.28x = 178,835.17 × 73,020.88
  4. Step 4: Simplify right side
    129,591.28x = 13,058,701,488.35
  5. Step 5: Solve for x
    x = 13,058,701,488.35/129,591.28
  6. Step 6: Final answer
    x = 100,768.37

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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.