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Finding the Fourth Proportional to 68,781.20, 103,201.47 and 37,213.49

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Solution

The fourth proportional to 68,781.20, 103,201.47 and 37,213.49 is: 55,836.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,781.20 : 103,201.47 = 37,213.49 : x
  2. Step 2: Convert to fraction form
    68,781.20/103,201.47 = 37,213.49/x
  3. Step 3: Cross multiply
    68,781.20x = 103,201.47 × 37,213.49
  4. Step 4: Simplify right side
    68,781.20x = 3,840,486,355.82
  5. Step 5: Solve for x
    x = 3,840,486,355.82/68,781.20
  6. Step 6: Final answer
    x = 55,836.28

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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.