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Finding the Fourth Proportional to 80.11, 109.96 and 75.50

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Solution

The fourth proportional to 80.11, 109.96 and 75.50 is: 103.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.11 : 109.96 = 75.50 : x
  2. Step 2: Convert to fraction form
    80.11/109.96 = 75.50/x
  3. Step 3: Cross multiply
    80.11x = 109.96 × 75.50
  4. Step 4: Simplify right side
    80.11x = 8,301.65
  5. Step 5: Solve for x
    x = 8,301.65/80.11
  6. Step 6: Final answer
    x = 103.63

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.