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Finding the Fourth Proportional to 79.12, 118.53 and 44.78

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Solution

The fourth proportional to 79.12, 118.53 and 44.78 is: 67.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.12 : 118.53 = 44.78 : x
  2. Step 2: Convert to fraction form
    79.12/118.53 = 44.78/x
  3. Step 3: Cross multiply
    79.12x = 118.53 × 44.78
  4. Step 4: Simplify right side
    79.12x = 5,306.96
  5. Step 5: Solve for x
    x = 5,306.96/79.12
  6. Step 6: Final answer
    x = 67.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.