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Finding the Fourth Proportional to 68,414.40, 102,620.89 and 21,667.27

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Solution

The fourth proportional to 68,414.40, 102,620.89 and 21,667.27 is: 32,500.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,414.40 : 102,620.89 = 21,667.27 : x
  2. Step 2: Convert to fraction form
    68,414.40/102,620.89 = 21,667.27/x
  3. Step 3: Cross multiply
    68,414.40x = 102,620.89 × 21,667.27
  4. Step 4: Simplify right side
    68,414.40x = 2,223,514,531.27
  5. Step 5: Solve for x
    x = 2,223,514,531.27/68,414.40
  6. Step 6: Final answer
    x = 32,500.68

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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.