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Finding the Fourth Proportional to 80,756.10, 120,837.87 and 67,396.08

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Solution

The fourth proportional to 80,756.10, 120,837.87 and 67,396.08 is: 100,846.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,756.10 : 120,837.87 = 67,396.08 : x
  2. Step 2: Convert to fraction form
    80,756.10/120,837.87 = 67,396.08/x
  3. Step 3: Cross multiply
    80,756.10x = 120,837.87 × 67,396.08
  4. Step 4: Simplify right side
    80,756.10x = 8,143,998,753.55
  5. Step 5: Solve for x
    x = 8,143,998,753.55/80,756.10
  6. Step 6: Final answer
    x = 100,846.86

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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.