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Finding the Fourth Proportional to 117.92, 175.89 and 113.72

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Solution

The fourth proportional to 117.92, 175.89 and 113.72 is: 169.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.92 : 175.89 = 113.72 : x
  2. Step 2: Convert to fraction form
    117.92/175.89 = 113.72/x
  3. Step 3: Cross multiply
    117.92x = 175.89 × 113.72
  4. Step 4: Simplify right side
    117.92x = 20,002.21
  5. Step 5: Solve for x
    x = 20,002.21/117.92
  6. Step 6: Final answer
    x = 169.63

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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.