Home / 80,471.11-120,711.28-21,305.24

Finding the Fourth Proportional to 80,471.11, 120,711.28 and 21,305.24

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Solution

The fourth proportional to 80,471.11, 120,711.28 and 21,305.24 is: 31,959.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,471.11 : 120,711.28 = 21,305.24 : x
  2. Step 2: Convert to fraction form
    80,471.11/120,711.28 = 21,305.24/x
  3. Step 3: Cross multiply
    80,471.11x = 120,711.28 × 21,305.24
  4. Step 4: Simplify right side
    80,471.11x = 2,571,782,684.58
  5. Step 5: Solve for x
    x = 2,571,782,684.58/80,471.11
  6. Step 6: Final answer
    x = 31,959.08

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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.