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Finding the Fourth Proportional to 97.44, 134.72 and 80.48

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Solution

The fourth proportional to 97.44, 134.72 and 80.48 is: 111.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.44 : 134.72 = 80.48 : x
  2. Step 2: Convert to fraction form
    97.44/134.72 = 80.48/x
  3. Step 3: Cross multiply
    97.44x = 134.72 × 80.48
  4. Step 4: Simplify right side
    97.44x = 10,842.27
  5. Step 5: Solve for x
    x = 10,842.27/97.44
  6. Step 6: Final answer
    x = 111.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.