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Finding the Fourth Proportional to 118.59, 178.11 and 115.86

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Solution

The fourth proportional to 118.59, 178.11 and 115.86 is: 174.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.59 : 178.11 = 115.86 : x
  2. Step 2: Convert to fraction form
    118.59/178.11 = 115.86/x
  3. Step 3: Cross multiply
    118.59x = 178.11 × 115.86
  4. Step 4: Simplify right side
    118.59x = 20,635.82
  5. Step 5: Solve for x
    x = 20,635.82/118.59
  6. Step 6: Final answer
    x = 174.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.