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Finding the Fourth Proportional to 95.13, 131.17 and 85.31

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Solution

The fourth proportional to 95.13, 131.17 and 85.31 is: 117.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.13 : 131.17 = 85.31 : x
  2. Step 2: Convert to fraction form
    95.13/131.17 = 85.31/x
  3. Step 3: Cross multiply
    95.13x = 131.17 × 85.31
  4. Step 4: Simplify right side
    95.13x = 11,189.46
  5. Step 5: Solve for x
    x = 11,189.46/95.13
  6. Step 6: Final answer
    x = 117.63

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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.