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Finding the Fourth Proportional to 68,425.25, 102,639.42 and 54,394.97

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Solution

The fourth proportional to 68,425.25, 102,639.42 and 54,394.97 is: 81,593.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,425.25 : 102,639.42 = 54,394.97 : x
  2. Step 2: Convert to fraction form
    68,425.25/102,639.42 = 54,394.97/x
  3. Step 3: Cross multiply
    68,425.25x = 102,639.42 × 54,394.97
  4. Step 4: Simplify right side
    68,425.25x = 5,583,067,658.52
  5. Step 5: Solve for x
    x = 5,583,067,658.52/68,425.25
  6. Step 6: Final answer
    x = 81,593.68

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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.