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Finding the Fourth Proportional to 96.42, 132.50 and 76.98

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Solution

The fourth proportional to 96.42, 132.50 and 76.98 is: 105.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.42 : 132.50 = 76.98 : x
  2. Step 2: Convert to fraction form
    96.42/132.50 = 76.98/x
  3. Step 3: Cross multiply
    96.42x = 132.50 × 76.98
  4. Step 4: Simplify right side
    96.42x = 10,199.47
  5. Step 5: Solve for x
    x = 10,199.47/96.42
  6. Step 6: Final answer
    x = 105.78

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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.