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Finding the Fourth Proportional to 118.99, 179.39 and 115.75

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Solution

The fourth proportional to 118.99, 179.39 and 115.75 is: 174.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.99 : 179.39 = 115.75 : x
  2. Step 2: Convert to fraction form
    118.99/179.39 = 115.75/x
  3. Step 3: Cross multiply
    118.99x = 179.39 × 115.75
  4. Step 4: Simplify right side
    118.99x = 20,764.39
  5. Step 5: Solve for x
    x = 20,764.39/118.99
  6. Step 6: Final answer
    x = 174.51

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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.