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Finding the Fourth Proportional to 84.44, 125.96 and 80.30

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Solution

The fourth proportional to 84.44, 125.96 and 80.30 is: 119.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.44 : 125.96 = 80.30 : x
  2. Step 2: Convert to fraction form
    84.44/125.96 = 80.30/x
  3. Step 3: Cross multiply
    84.44x = 125.96 × 80.30
  4. Step 4: Simplify right side
    84.44x = 10,114.59
  5. Step 5: Solve for x
    x = 10,114.59/84.44
  6. Step 6: Final answer
    x = 119.78

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.