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Finding the Fourth Proportional to 68,251.92, 102,489.03 and 42,122.76

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Solution

The fourth proportional to 68,251.92, 102,489.03 and 42,122.76 is: 63,252.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,251.92 : 102,489.03 = 42,122.76 : x
  2. Step 2: Convert to fraction form
    68,251.92/102,489.03 = 42,122.76/x
  3. Step 3: Cross multiply
    68,251.92x = 102,489.03 × 42,122.76
  4. Step 4: Simplify right side
    68,251.92x = 4,317,120,813.32
  5. Step 5: Solve for x
    x = 4,317,120,813.32/68,251.92
  6. Step 6: Final answer
    x = 63,252.74

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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.