Home / 81,722.28-122,591.39-31,806.44

Finding the Fourth Proportional to 81,722.28, 122,591.39 and 31,806.44

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Solution

The fourth proportional to 81,722.28, 122,591.39 and 31,806.44 is: 47,712.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,722.28 : 122,591.39 = 31,806.44 : x
  2. Step 2: Convert to fraction form
    81,722.28/122,591.39 = 31,806.44/x
  3. Step 3: Cross multiply
    81,722.28x = 122,591.39 × 31,806.44
  4. Step 4: Simplify right side
    81,722.28x = 3,899,194,918.56
  5. Step 5: Solve for x
    x = 3,899,194,918.56/81,722.28
  6. Step 6: Final answer
    x = 47,712.75

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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.