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Finding the Fourth Proportional to 151.36, 226.92 and 87.28

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Solution

The fourth proportional to 151.36, 226.92 and 87.28 is: 130.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.36 : 226.92 = 87.28 : x
  2. Step 2: Convert to fraction form
    151.36/226.92 = 87.28/x
  3. Step 3: Cross multiply
    151.36x = 226.92 × 87.28
  4. Step 4: Simplify right side
    151.36x = 19,805.58
  5. Step 5: Solve for x
    x = 19,805.58/151.36
  6. Step 6: Final answer
    x = 130.85

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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.