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Finding the Fourth Proportional to 151.65, 227.51 and 74.51

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Solution

The fourth proportional to 151.65, 227.51 and 74.51 is: 111.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.65 : 227.51 = 74.51 : x
  2. Step 2: Convert to fraction form
    151.65/227.51 = 74.51/x
  3. Step 3: Cross multiply
    151.65x = 227.51 × 74.51
  4. Step 4: Simplify right side
    151.65x = 16,950.82
  5. Step 5: Solve for x
    x = 16,950.82/151.65
  6. Step 6: Final answer
    x = 111.78

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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.