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Finding the Fourth Proportional to 80,576, 120,747.20 and 45,440.96

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Solution

The fourth proportional to 80,576, 120,747.20 and 45,440.96 is: 68,095.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,576 : 120,747.20 = 45,440.96 : x
  2. Step 2: Convert to fraction form
    80,576/120,747.20 = 45,440.96/x
  3. Step 3: Cross multiply
    80,576x = 120,747.20 × 45,440.96
  4. Step 4: Simplify right side
    80,576x = 5,486,868,685.31
  5. Step 5: Solve for x
    x = 5,486,868,685.31/80,576
  6. Step 6: Final answer
    x = 68,095.57

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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.