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Finding the Fourth Proportional to 68,562.30, 102,843.45 and 21,819.90

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Solution

The fourth proportional to 68,562.30, 102,843.45 and 21,819.90 is: 32,729.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,562.30 : 102,843.45 = 21,819.90 : x
  2. Step 2: Convert to fraction form
    68,562.30/102,843.45 = 21,819.90/x
  3. Step 3: Cross multiply
    68,562.30x = 102,843.45 × 21,819.90
  4. Step 4: Simplify right side
    68,562.30x = 2,244,033,794.66
  5. Step 5: Solve for x
    x = 2,244,033,794.66/68,562.30
  6. Step 6: Final answer
    x = 32,729.85

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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.