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Finding the Fourth Proportional to 68,791.13, 103,169.61 and 38,818.53

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Solution

The fourth proportional to 68,791.13, 103,169.61 and 38,818.53 is: 58,218.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,791.13 : 103,169.61 = 38,818.53 : x
  2. Step 2: Convert to fraction form
    68,791.13/103,169.61 = 38,818.53/x
  3. Step 3: Cross multiply
    68,791.13x = 103,169.61 × 38,818.53
  4. Step 4: Simplify right side
    68,791.13x = 4,004,892,600.87
  5. Step 5: Solve for x
    x = 4,004,892,600.87/68,791.13
  6. Step 6: Final answer
    x = 58,218.15

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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.