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Finding the Fourth Proportional to 68,759.43, 103,141.31 and 21,374.77

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Solution

The fourth proportional to 68,759.43, 103,141.31 and 21,374.77 is: 32,062.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,759.43 : 103,141.31 = 21,374.77 : x
  2. Step 2: Convert to fraction form
    68,759.43/103,141.31 = 21,374.77/x
  3. Step 3: Cross multiply
    68,759.43x = 103,141.31 × 21,374.77
  4. Step 4: Simplify right side
    68,759.43x = 2,204,621,778.75
  5. Step 5: Solve for x
    x = 2,204,621,778.75/68,759.43
  6. Step 6: Final answer
    x = 32,062.83

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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.