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Finding the Fourth Proportional to 168,761.10, 253,141.89 and 68,921.30

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Solution

The fourth proportional to 168,761.10, 253,141.89 and 68,921.30 is: 103,382.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,761.10 : 253,141.89 = 68,921.30 : x
  2. Step 2: Convert to fraction form
    168,761.10/253,141.89 = 68,921.30/x
  3. Step 3: Cross multiply
    168,761.10x = 253,141.89 × 68,921.30
  4. Step 4: Simplify right side
    168,761.10x = 17,446,866,877.55
  5. Step 5: Solve for x
    x = 17,446,866,877.55/168,761.10
  6. Step 6: Final answer
    x = 103,382.04

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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.