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Finding the Fourth Proportional to 113.28, 170.80 and 107.36

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Solution

The fourth proportional to 113.28, 170.80 and 107.36 is: 161.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.28 : 170.80 = 107.36 : x
  2. Step 2: Convert to fraction form
    113.28/170.80 = 107.36/x
  3. Step 3: Cross multiply
    113.28x = 170.80 × 107.36
  4. Step 4: Simplify right side
    113.28x = 18,337.09
  5. Step 5: Solve for x
    x = 18,337.09/113.28
  6. Step 6: Final answer
    x = 161.87

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.