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Finding the Fourth Proportional to 79.32, 118.04 and 76.44

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Solution

The fourth proportional to 79.32, 118.04 and 76.44 is: 113.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.32 : 118.04 = 76.44 : x
  2. Step 2: Convert to fraction form
    79.32/118.04 = 76.44/x
  3. Step 3: Cross multiply
    79.32x = 118.04 × 76.44
  4. Step 4: Simplify right side
    79.32x = 9,022.98
  5. Step 5: Solve for x
    x = 9,022.98/79.32
  6. Step 6: Final answer
    x = 113.75

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.