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Finding the Fourth Proportional to 133.53, 184.25 and 81.11

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Solution

The fourth proportional to 133.53, 184.25 and 81.11 is: 111.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.53 : 184.25 = 81.11 : x
  2. Step 2: Convert to fraction form
    133.53/184.25 = 81.11/x
  3. Step 3: Cross multiply
    133.53x = 184.25 × 81.11
  4. Step 4: Simplify right side
    133.53x = 14,943.19
  5. Step 5: Solve for x
    x = 14,943.19/133.53
  6. Step 6: Final answer
    x = 111.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.