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Finding the Fourth Proportional to 151.91, 227.88 and 74.81

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Solution

The fourth proportional to 151.91, 227.88 and 74.81 is: 112.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.91 : 227.88 = 74.81 : x
  2. Step 2: Convert to fraction form
    151.91/227.88 = 74.81/x
  3. Step 3: Cross multiply
    151.91x = 227.88 × 74.81
  4. Step 4: Simplify right side
    151.91x = 17,046.42
  5. Step 5: Solve for x
    x = 17,046.42/151.91
  6. Step 6: Final answer
    x = 112.22

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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.