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Finding the Fourth Proportional to 113.18, 169.86 and 79.04

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Solution

The fourth proportional to 113.18, 169.86 and 79.04 is: 118.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.18 : 169.86 = 79.04 : x
  2. Step 2: Convert to fraction form
    113.18/169.86 = 79.04/x
  3. Step 3: Cross multiply
    113.18x = 169.86 × 79.04
  4. Step 4: Simplify right side
    113.18x = 13,425.73
  5. Step 5: Solve for x
    x = 13,425.73/113.18
  6. Step 6: Final answer
    x = 118.62

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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.