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Finding the Fourth Proportional to 184.11, 276.09 and 81.32

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Solution

The fourth proportional to 184.11, 276.09 and 81.32 is: 121.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    184.11 : 276.09 = 81.32 : x
  2. Step 2: Convert to fraction form
    184.11/276.09 = 81.32/x
  3. Step 3: Cross multiply
    184.11x = 276.09 × 81.32
  4. Step 4: Simplify right side
    184.11x = 22,451.64
  5. Step 5: Solve for x
    x = 22,451.64/184.11
  6. Step 6: Final answer
    x = 121.95

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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.