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Finding the Fourth Proportional to 95.53, 131.12 and 87.31

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Solution

The fourth proportional to 95.53, 131.12 and 87.31 is: 119.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.53 : 131.12 = 87.31 : x
  2. Step 2: Convert to fraction form
    95.53/131.12 = 87.31/x
  3. Step 3: Cross multiply
    95.53x = 131.12 × 87.31
  4. Step 4: Simplify right side
    95.53x = 11,448.09
  5. Step 5: Solve for x
    x = 11,448.09/95.53
  6. Step 6: Final answer
    x = 119.84

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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.