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Finding the Fourth Proportional to 151.66, 227.56 and 85.82

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Solution

The fourth proportional to 151.66, 227.56 and 85.82 is: 128.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.66 : 227.56 = 85.82 : x
  2. Step 2: Convert to fraction form
    151.66/227.56 = 85.82/x
  3. Step 3: Cross multiply
    151.66x = 227.56 × 85.82
  4. Step 4: Simplify right side
    151.66x = 19,529.20
  5. Step 5: Solve for x
    x = 19,529.20/151.66
  6. Step 6: Final answer
    x = 128.77

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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.