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Finding the Fourth Proportional to 92,004.80, 137,861.40 and 68,385.20

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Solution

The fourth proportional to 92,004.80, 137,861.40 and 68,385.20 is: 102,469.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,004.80 : 137,861.40 = 68,385.20 : x
  2. Step 2: Convert to fraction form
    92,004.80/137,861.40 = 68,385.20/x
  3. Step 3: Cross multiply
    92,004.80x = 137,861.40 × 68,385.20
  4. Step 4: Simplify right side
    92,004.80x = 9,427,679,411.28
  5. Step 5: Solve for x
    x = 9,427,679,411.28/92,004.80
  6. Step 6: Final answer
    x = 102,469.43

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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.