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Finding the Fourth Proportional to 78,847.90, 118,306.95 and 41,398.90

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Solution

The fourth proportional to 78,847.90, 118,306.95 and 41,398.90 is: 62,116.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,847.90 : 118,306.95 = 41,398.90 : x
  2. Step 2: Convert to fraction form
    78,847.90/118,306.95 = 41,398.90/x
  3. Step 3: Cross multiply
    78,847.90x = 118,306.95 × 41,398.90
  4. Step 4: Simplify right side
    78,847.90x = 4,897,777,592.36
  5. Step 5: Solve for x
    x = 4,897,777,592.36/78,847.90
  6. Step 6: Final answer
    x = 62,116.78

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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.