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Finding the Fourth Proportional to 113.60, 170.15 and 106.79

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Solution

The fourth proportional to 113.60, 170.15 and 106.79 is: 159.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.60 : 170.15 = 106.79 : x
  2. Step 2: Convert to fraction form
    113.60/170.15 = 106.79/x
  3. Step 3: Cross multiply
    113.60x = 170.15 × 106.79
  4. Step 4: Simplify right side
    113.60x = 18,168.93
  5. Step 5: Solve for x
    x = 18,168.93/113.60
  6. Step 6: Final answer
    x = 159.94

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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.