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Finding the Fourth Proportional to 95.84, 131.56 and 87.20

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Solution

The fourth proportional to 95.84, 131.56 and 87.20 is: 119.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.84 : 131.56 = 87.20 : x
  2. Step 2: Convert to fraction form
    95.84/131.56 = 87.20/x
  3. Step 3: Cross multiply
    95.84x = 131.56 × 87.20
  4. Step 4: Simplify right side
    95.84x = 11,472.03
  5. Step 5: Solve for x
    x = 11,472.03/95.84
  6. Step 6: Final answer
    x = 119.70

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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.