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Finding the Fourth Proportional to 80,605.28, 120,928.41 and 47,353.46

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Solution

The fourth proportional to 80,605.28, 120,928.41 and 47,353.46 is: 71,042.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,605.28 : 120,928.41 = 47,353.46 : x
  2. Step 2: Convert to fraction form
    80,605.28/120,928.41 = 47,353.46/x
  3. Step 3: Cross multiply
    80,605.28x = 120,928.41 × 47,353.46
  4. Step 4: Simplify right side
    80,605.28x = 5,726,378,625.80
  5. Step 5: Solve for x
    x = 5,726,378,625.80/80,605.28
  6. Step 6: Final answer
    x = 71,042.23

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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.