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Finding the Fourth Proportional to 95.81, 132.39 and 76.64

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Solution

The fourth proportional to 95.81, 132.39 and 76.64 is: 105.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.81 : 132.39 = 76.64 : x
  2. Step 2: Convert to fraction form
    95.81/132.39 = 76.64/x
  3. Step 3: Cross multiply
    95.81x = 132.39 × 76.64
  4. Step 4: Simplify right side
    95.81x = 10,145.71
  5. Step 5: Solve for x
    x = 10,145.71/95.81
  6. Step 6: Final answer
    x = 105.90

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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.