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Finding the Fourth Proportional to 113.76, 169.66 and 107.32

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Solution

The fourth proportional to 113.76, 169.66 and 107.32 is: 160.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.76 : 169.66 = 107.32 : x
  2. Step 2: Convert to fraction form
    113.76/169.66 = 107.32/x
  3. Step 3: Cross multiply
    113.76x = 169.66 × 107.32
  4. Step 4: Simplify right side
    113.76x = 18,207.91
  5. Step 5: Solve for x
    x = 18,207.91/113.76
  6. Step 6: Final answer
    x = 160.06

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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.