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Finding the Fourth Proportional to 68,367.67, 102,403.85 and 66,694.61

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Solution

The fourth proportional to 68,367.67, 102,403.85 and 66,694.61 is: 99,897.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,367.67 : 102,403.85 = 66,694.61 : x
  2. Step 2: Convert to fraction form
    68,367.67/102,403.85 = 66,694.61/x
  3. Step 3: Cross multiply
    68,367.67x = 102,403.85 × 66,694.61
  4. Step 4: Simplify right side
    68,367.67x = 6,829,784,760.79
  5. Step 5: Solve for x
    x = 6,829,784,760.79/68,367.67
  6. Step 6: Final answer
    x = 99,897.88

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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.