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Finding the Fourth Proportional to 68,364.62, 102,399.30 and 66,691.57

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Solution

The fourth proportional to 68,364.62, 102,399.30 and 66,691.57 is: 99,893.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,364.62 : 102,399.30 = 66,691.57 : x
  2. Step 2: Convert to fraction form
    68,364.62/102,399.30 = 66,691.57/x
  3. Step 3: Cross multiply
    68,364.62x = 102,399.30 × 66,691.57
  4. Step 4: Simplify right side
    68,364.62x = 6,829,169,571.90
  5. Step 5: Solve for x
    x = 6,829,169,571.90/68,364.62
  6. Step 6: Final answer
    x = 99,893.33

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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.