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Finding the Fourth Proportional to 100,553.77, 138,829.20 and 62,353.90

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Solution

The fourth proportional to 100,553.77, 138,829.20 and 62,353.90 is: 86,088.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,553.77 : 138,829.20 = 62,353.90 : x
  2. Step 2: Convert to fraction form
    100,553.77/138,829.20 = 62,353.90/x
  3. Step 3: Cross multiply
    100,553.77x = 138,829.20 × 62,353.90
  4. Step 4: Simplify right side
    100,553.77x = 8,656,542,053.88
  5. Step 5: Solve for x
    x = 8,656,542,053.88/100,553.77
  6. Step 6: Final answer
    x = 86,088.69

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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.