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Finding the Fourth Proportional to 80,487.30, 120,857.32 and 68,168.82

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Solution

The fourth proportional to 80,487.30, 120,857.32 and 68,168.82 is: 102,360.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,487.30 : 120,857.32 = 68,168.82 : x
  2. Step 2: Convert to fraction form
    80,487.30/120,857.32 = 68,168.82/x
  3. Step 3: Cross multiply
    80,487.30x = 120,857.32 × 68,168.82
  4. Step 4: Simplify right side
    80,487.30x = 8,238,700,892.76
  5. Step 5: Solve for x
    x = 8,238,700,892.76/80,487.30
  6. Step 6: Final answer
    x = 102,360.26

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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.