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Finding the Fourth Proportional to 68,593.20, 102,909.28 and 21,849.68

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Solution

The fourth proportional to 68,593.20, 102,909.28 and 21,849.68 is: 32,780.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,593.20 : 102,909.28 = 21,849.68 : x
  2. Step 2: Convert to fraction form
    68,593.20/102,909.28 = 21,849.68/x
  3. Step 3: Cross multiply
    68,593.20x = 102,909.28 × 21,849.68
  4. Step 4: Simplify right side
    68,593.20x = 2,248,534,837.03
  5. Step 5: Solve for x
    x = 2,248,534,837.03/68,593.20
  6. Step 6: Final answer
    x = 32,780.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.