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Finding the Fourth Proportional to 95.62, 131.97 and 78.34

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Solution

The fourth proportional to 95.62, 131.97 and 78.34 is: 108.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.62 : 131.97 = 78.34 : x
  2. Step 2: Convert to fraction form
    95.62/131.97 = 78.34/x
  3. Step 3: Cross multiply
    95.62x = 131.97 × 78.34
  4. Step 4: Simplify right side
    95.62x = 10,338.53
  5. Step 5: Solve for x
    x = 10,338.53/95.62
  6. Step 6: Final answer
    x = 108.12

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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.