Home / 219,761.28-329,419.60-86,589.76

Finding the Fourth Proportional to 219,761.28, 329,419.60 and 86,589.76

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Solution

The fourth proportional to 219,761.28, 329,419.60 and 86,589.76 is: 129,797.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,761.28 : 329,419.60 = 86,589.76 : x
  2. Step 2: Convert to fraction form
    219,761.28/329,419.60 = 86,589.76/x
  3. Step 3: Cross multiply
    219,761.28x = 329,419.60 × 86,589.76
  4. Step 4: Simplify right side
    219,761.28x = 28,524,364,103.30
  5. Step 5: Solve for x
    x = 28,524,364,103.30/219,761.28
  6. Step 6: Final answer
    x = 129,797.04

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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.