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Finding the Fourth Proportional to 80,311.65, 120,399.57 and 50,664.30

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Solution

The fourth proportional to 80,311.65, 120,399.57 and 50,664.30 is: 75,953.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,311.65 : 120,399.57 = 50,664.30 : x
  2. Step 2: Convert to fraction form
    80,311.65/120,399.57 = 50,664.30/x
  3. Step 3: Cross multiply
    80,311.65x = 120,399.57 × 50,664.30
  4. Step 4: Simplify right side
    80,311.65x = 6,099,959,934.35
  5. Step 5: Solve for x
    x = 6,099,959,934.35/80,311.65
  6. Step 6: Final answer
    x = 75,953.61

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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.