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Finding the Fourth Proportional to 113.27, 169.07 and 98.91

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Solution

The fourth proportional to 113.27, 169.07 and 98.91 is: 147.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.27 : 169.07 = 98.91 : x
  2. Step 2: Convert to fraction form
    113.27/169.07 = 98.91/x
  3. Step 3: Cross multiply
    113.27x = 169.07 × 98.91
  4. Step 4: Simplify right side
    113.27x = 16,722.22
  5. Step 5: Solve for x
    x = 16,722.22/113.27
  6. Step 6: Final answer
    x = 147.64

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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.