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Finding the Fourth Proportional to 69,141.96, 103,712.26 and 31,691.40

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Solution

The fourth proportional to 69,141.96, 103,712.26 and 31,691.40 is: 47,536.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,141.96 : 103,712.26 = 31,691.40 : x
  2. Step 2: Convert to fraction form
    69,141.96/103,712.26 = 31,691.40/x
  3. Step 3: Cross multiply
    69,141.96x = 103,712.26 × 31,691.40
  4. Step 4: Simplify right side
    69,141.96x = 3,286,786,716.56
  5. Step 5: Solve for x
    x = 3,286,786,716.56/69,141.96
  6. Step 6: Final answer
    x = 47,536.79

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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.