Home / 81,691.39-122,536.64-31,806.19

Finding the Fourth Proportional to 81,691.39, 122,536.64 and 31,806.19

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Solution

The fourth proportional to 81,691.39, 122,536.64 and 31,806.19 is: 47,709.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,691.39 : 122,536.64 = 31,806.19 : x
  2. Step 2: Convert to fraction form
    81,691.39/122,536.64 = 31,806.19/x
  3. Step 3: Cross multiply
    81,691.39x = 122,536.64 × 31,806.19
  4. Step 4: Simplify right side
    81,691.39x = 3,897,423,494.77
  5. Step 5: Solve for x
    x = 3,897,423,494.77/81,691.39
  6. Step 6: Final answer
    x = 47,709.11

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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.