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Finding the Fourth Proportional to 183.55, 275.31 and 80.82

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Solution

The fourth proportional to 183.55, 275.31 and 80.82 is: 121.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    183.55 : 275.31 = 80.82 : x
  2. Step 2: Convert to fraction form
    183.55/275.31 = 80.82/x
  3. Step 3: Cross multiply
    183.55x = 275.31 × 80.82
  4. Step 4: Simplify right side
    183.55x = 22,249.52
  5. Step 5: Solve for x
    x = 22,249.52/183.55
  6. Step 6: Final answer
    x = 121.22

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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.