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Finding the Fourth Proportional to 169,145.10, 253,691.19 and 74,354.31

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Solution

The fourth proportional to 169,145.10, 253,691.19 and 74,354.31 is: 111,519.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,145.10 : 253,691.19 = 74,354.31 : x
  2. Step 2: Convert to fraction form
    169,145.10/253,691.19 = 74,354.31/x
  3. Step 3: Cross multiply
    169,145.10x = 253,691.19 × 74,354.31
  4. Step 4: Simplify right side
    169,145.10x = 18,863,033,385.53
  5. Step 5: Solve for x
    x = 18,863,033,385.53/169,145.10
  6. Step 6: Final answer
    x = 111,519.83

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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.