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Finding the Fourth Proportional to 68,023.38, 101,865.38 and 42,987.90

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Solution

The fourth proportional to 68,023.38, 101,865.38 and 42,987.90 is: 64,374.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,023.38 : 101,865.38 = 42,987.90 : x
  2. Step 2: Convert to fraction form
    68,023.38/101,865.38 = 42,987.90/x
  3. Step 3: Cross multiply
    68,023.38x = 101,865.38 × 42,987.90
  4. Step 4: Simplify right side
    68,023.38x = 4,378,978,553.96
  5. Step 5: Solve for x
    x = 4,378,978,553.96/68,023.38
  6. Step 6: Final answer
    x = 64,374.61

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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.