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Finding the Fourth Proportional to 151.90, 227.86 and 121.52

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Solution

The fourth proportional to 151.90, 227.86 and 121.52 is: 182.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.90 : 227.86 = 121.52 : x
  2. Step 2: Convert to fraction form
    151.90/227.86 = 121.52/x
  3. Step 3: Cross multiply
    151.90x = 227.86 × 121.52
  4. Step 4: Simplify right side
    151.90x = 27,689.81
  5. Step 5: Solve for x
    x = 27,689.81/151.90
  6. Step 6: Final answer
    x = 182.29

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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.