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Finding the Fourth Proportional to 151.66, 227.74 and 115.11

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Solution

The fourth proportional to 151.66, 227.74 and 115.11 is: 172.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.66 : 227.74 = 115.11 : x
  2. Step 2: Convert to fraction form
    151.66/227.74 = 115.11/x
  3. Step 3: Cross multiply
    151.66x = 227.74 × 115.11
  4. Step 4: Simplify right side
    151.66x = 26,213.72
  5. Step 5: Solve for x
    x = 26,213.72/151.66
  6. Step 6: Final answer
    x = 172.85

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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.