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Finding the Fourth Proportional to 42,463.80, 63,695.70 and 38,770.20

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Solution

The fourth proportional to 42,463.80, 63,695.70 and 38,770.20 is: 58,155.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,463.80 : 63,695.70 = 38,770.20 : x
  2. Step 2: Convert to fraction form
    42,463.80/63,695.70 = 38,770.20/x
  3. Step 3: Cross multiply
    42,463.80x = 63,695.70 × 38,770.20
  4. Step 4: Simplify right side
    42,463.80x = 2,469,495,028.14
  5. Step 5: Solve for x
    x = 2,469,495,028.14/42,463.80
  6. Step 6: Final answer
    x = 58,155.30

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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.