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Finding the Fourth Proportional to 68,698.86, 103,044.87 and 40,251.90

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Solution

The fourth proportional to 68,698.86, 103,044.87 and 40,251.90 is: 60,375.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,698.86 : 103,044.87 = 40,251.90 : x
  2. Step 2: Convert to fraction form
    68,698.86/103,044.87 = 40,251.90/x
  3. Step 3: Cross multiply
    68,698.86x = 103,044.87 × 40,251.90
  4. Step 4: Simplify right side
    68,698.86x = 4,147,751,802.75
  5. Step 5: Solve for x
    x = 4,147,751,802.75/68,698.86
  6. Step 6: Final answer
    x = 60,375.85

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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.