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Finding the Fourth Proportional to 79.33, 118.25 and 77.96

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Solution

The fourth proportional to 79.33, 118.25 and 77.96 is: 116.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.33 : 118.25 = 77.96 : x
  2. Step 2: Convert to fraction form
    79.33/118.25 = 77.96/x
  3. Step 3: Cross multiply
    79.33x = 118.25 × 77.96
  4. Step 4: Simplify right side
    79.33x = 9,218.77
  5. Step 5: Solve for x
    x = 9,218.77/79.33
  6. Step 6: Final answer
    x = 116.21

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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.