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Finding the Fourth Proportional to 100,553.88, 138,748.92 and 58,104.20

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Solution

The fourth proportional to 100,553.88, 138,748.92 and 58,104.20 is: 80,174.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,553.88 : 138,748.92 = 58,104.20 : x
  2. Step 2: Convert to fraction form
    100,553.88/138,748.92 = 58,104.20/x
  3. Step 3: Cross multiply
    100,553.88x = 138,748.92 × 58,104.20
  4. Step 4: Simplify right side
    100,553.88x = 8,061,894,997.46
  5. Step 5: Solve for x
    x = 8,061,894,997.46/100,553.88
  6. Step 6: Final answer
    x = 80,174.88

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1.5x scale

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.