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Finding the Fourth Proportional to 96.63, 133.17 and 79.11

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Solution

The fourth proportional to 96.63, 133.17 and 79.11 is: 109.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.63 : 133.17 = 79.11 : x
  2. Step 2: Convert to fraction form
    96.63/133.17 = 79.11/x
  3. Step 3: Cross multiply
    96.63x = 133.17 × 79.11
  4. Step 4: Simplify right side
    96.63x = 10,535.08
  5. Step 5: Solve for x
    x = 10,535.08/96.63
  6. Step 6: Final answer
    x = 109.02

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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.