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Finding the Fourth Proportional to 113.96, 171.03 and 79.79

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Solution

The fourth proportional to 113.96, 171.03 and 79.79 is: 119.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.96 : 171.03 = 79.79 : x
  2. Step 2: Convert to fraction form
    113.96/171.03 = 79.79/x
  3. Step 3: Cross multiply
    113.96x = 171.03 × 79.79
  4. Step 4: Simplify right side
    113.96x = 13,646.06
  5. Step 5: Solve for x
    x = 13,646.06/113.96
  6. Step 6: Final answer
    x = 119.75

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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.