Home / 81,691.14-122,536.26-31,805.94

Finding the Fourth Proportional to 81,691.14, 122,536.26 and 31,805.94

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Solution

The fourth proportional to 81,691.14, 122,536.26 and 31,805.94 is: 47,708.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,691.14 : 122,536.26 = 31,805.94 : x
  2. Step 2: Convert to fraction form
    81,691.14/122,536.26 = 31,805.94/x
  3. Step 3: Cross multiply
    81,691.14x = 122,536.26 × 31,805.94
  4. Step 4: Simplify right side
    81,691.14x = 3,897,380,933.38
  5. Step 5: Solve for x
    x = 3,897,380,933.38/81,691.14
  6. Step 6: Final answer
    x = 47,708.73

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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.