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Finding the Fourth Proportional to 68,171.79, 102,256.15 and 18,251.85

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Solution

The fourth proportional to 68,171.79, 102,256.15 and 18,251.85 is: 27,377.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,171.79 : 102,256.15 = 18,251.85 : x
  2. Step 2: Convert to fraction form
    68,171.79/102,256.15 = 18,251.85/x
  3. Step 3: Cross multiply
    68,171.79x = 102,256.15 × 18,251.85
  4. Step 4: Simplify right side
    68,171.79x = 1,866,363,911.38
  5. Step 5: Solve for x
    x = 1,866,363,911.38/68,171.79
  6. Step 6: Final answer
    x = 27,377.36

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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.