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Finding the Fourth Proportional to 80,396.28, 120,675.48 and 71,097.48

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Solution

The fourth proportional to 80,396.28, 120,675.48 and 71,097.48 is: 106,717.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,396.28 : 120,675.48 = 71,097.48 : x
  2. Step 2: Convert to fraction form
    80,396.28/120,675.48 = 71,097.48/x
  3. Step 3: Cross multiply
    80,396.28x = 120,675.48 × 71,097.48
  4. Step 4: Simplify right side
    80,396.28x = 8,579,722,525.79
  5. Step 5: Solve for x
    x = 8,579,722,525.79/80,396.28
  6. Step 6: Final answer
    x = 106,717.90

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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.