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Finding the Fourth Proportional to 118.07, 175.89 and 113.72

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Solution

The fourth proportional to 118.07, 175.89 and 113.72 is: 169.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.07 : 175.89 = 113.72 : x
  2. Step 2: Convert to fraction form
    118.07/175.89 = 113.72/x
  3. Step 3: Cross multiply
    118.07x = 175.89 × 113.72
  4. Step 4: Simplify right side
    118.07x = 20,001.76
  5. Step 5: Solve for x
    x = 20,001.76/118.07
  6. Step 6: Final answer
    x = 169.41

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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.