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Finding the Fourth Proportional to 118.37, 178.38 and 114.73

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Solution

The fourth proportional to 118.37, 178.38 and 114.73 is: 172.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.37 : 178.38 = 114.73 : x
  2. Step 2: Convert to fraction form
    118.37/178.38 = 114.73/x
  3. Step 3: Cross multiply
    118.37x = 178.38 × 114.73
  4. Step 4: Simplify right side
    118.37x = 20,465.09
  5. Step 5: Solve for x
    x = 20,465.09/118.37
  6. Step 6: Final answer
    x = 172.89

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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.