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Finding the Fourth Proportional to 80,305.60, 120,532.40 and 40,891

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Solution

The fourth proportional to 80,305.60, 120,532.40 and 40,891 is: 61,374.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,305.60 : 120,532.40 = 40,891 : x
  2. Step 2: Convert to fraction form
    80,305.60/120,532.40 = 40,891/x
  3. Step 3: Cross multiply
    80,305.60x = 120,532.40 × 40,891
  4. Step 4: Simplify right side
    80,305.60x = 4,928,690,368.40
  5. Step 5: Solve for x
    x = 4,928,690,368.40/80,305.60
  6. Step 6: Final answer
    x = 61,374.18

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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.