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Finding the Fourth Proportional to 79.75, 119.65 and 22.75

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Solution

The fourth proportional to 79.75, 119.65 and 22.75 is: 34.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.75 : 119.65 = 22.75 : x
  2. Step 2: Convert to fraction form
    79.75/119.65 = 22.75/x
  3. Step 3: Cross multiply
    79.75x = 119.65 × 22.75
  4. Step 4: Simplify right side
    79.75x = 2,721.92
  5. Step 5: Solve for x
    x = 2,721.92/79.75
  6. Step 6: Final answer
    x = 34.13

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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.