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Finding the Fourth Proportional to 80,722.46, 120,699.09 and 73,664.12

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Solution

The fourth proportional to 80,722.46, 120,699.09 and 73,664.12 is: 110,145.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,722.46 : 120,699.09 = 73,664.12 : x
  2. Step 2: Convert to fraction form
    80,722.46/120,699.09 = 73,664.12/x
  3. Step 3: Cross multiply
    80,722.46x = 120,699.09 × 73,664.12
  4. Step 4: Simplify right side
    80,722.46x = 8,891,192,249.65
  5. Step 5: Solve for x
    x = 8,891,192,249.65/80,722.46
  6. Step 6: Final answer
    x = 110,145.21

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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.