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Finding the Fourth Proportional to 80,286.96, 120,404.92 and 75,045.44

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Solution

The fourth proportional to 80,286.96, 120,404.92 and 75,045.44 is: 112,544.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,286.96 : 120,404.92 = 75,045.44 : x
  2. Step 2: Convert to fraction form
    80,286.96/120,404.92 = 75,045.44/x
  3. Step 3: Cross multiply
    80,286.96x = 120,404.92 × 75,045.44
  4. Step 4: Simplify right side
    80,286.96x = 9,035,840,199.56
  5. Step 5: Solve for x
    x = 9,035,840,199.56/80,286.96
  6. Step 6: Final answer
    x = 112,544.31

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1.5x scale

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.