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Finding the Fourth Proportional to 184.05, 275.84 and 81.21

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Solution

The fourth proportional to 184.05, 275.84 and 81.21 is: 121.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    184.05 : 275.84 = 81.21 : x
  2. Step 2: Convert to fraction form
    184.05/275.84 = 81.21/x
  3. Step 3: Cross multiply
    184.05x = 275.84 × 81.21
  4. Step 4: Simplify right side
    184.05x = 22,400.56
  5. Step 5: Solve for x
    x = 22,400.56/184.05
  6. Step 6: Final answer
    x = 121.71

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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.