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Finding the Fourth Proportional to 183.11, 274.42 and 91.78

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Solution

The fourth proportional to 183.11, 274.42 and 91.78 is: 137.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    183.11 : 274.42 = 91.78 : x
  2. Step 2: Convert to fraction form
    183.11/274.42 = 91.78/x
  3. Step 3: Cross multiply
    183.11x = 274.42 × 91.78
  4. Step 4: Simplify right side
    183.11x = 25,186.27
  5. Step 5: Solve for x
    x = 25,186.27/183.11
  6. Step 6: Final answer
    x = 137.55

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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.