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Finding the Fourth Proportional to 67,991.28, 101,900.38 and 38,425.60

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Solution

The fourth proportional to 67,991.28, 101,900.38 and 38,425.60 is: 57,589.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,991.28 : 101,900.38 = 38,425.60 : x
  2. Step 2: Convert to fraction form
    67,991.28/101,900.38 = 38,425.60/x
  3. Step 3: Cross multiply
    67,991.28x = 101,900.38 × 38,425.60
  4. Step 4: Simplify right side
    67,991.28x = 3,915,583,241.73
  5. Step 5: Solve for x
    x = 3,915,583,241.73/67,991.28
  6. Step 6: Final answer
    x = 57,589.49

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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.