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Finding the Fourth Proportional to 84.53, 115.96 and 79.29

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Solution

The fourth proportional to 84.53, 115.96 and 79.29 is: 108.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.53 : 115.96 = 79.29 : x
  2. Step 2: Convert to fraction form
    84.53/115.96 = 79.29/x
  3. Step 3: Cross multiply
    84.53x = 115.96 × 79.29
  4. Step 4: Simplify right side
    84.53x = 9,193.69
  5. Step 5: Solve for x
    x = 9,193.69/84.53
  6. Step 6: Final answer
    x = 108.77

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.