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Finding the Fourth Proportional to 95.34, 131.49 and 81.51

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Solution

The fourth proportional to 95.34, 131.49 and 81.51 is: 112.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.34 : 131.49 = 81.51 : x
  2. Step 2: Convert to fraction form
    95.34/131.49 = 81.51/x
  3. Step 3: Cross multiply
    95.34x = 131.49 × 81.51
  4. Step 4: Simplify right side
    95.34x = 10,717.75
  5. Step 5: Solve for x
    x = 10,717.75/95.34
  6. Step 6: Final answer
    x = 112.42

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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.