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Finding the Fourth Proportional to 183.12, 274.52 and 142.72

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Solution

The fourth proportional to 183.12, 274.52 and 142.72 is: 213.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    183.12 : 274.52 = 142.72 : x
  2. Step 2: Convert to fraction form
    183.12/274.52 = 142.72/x
  3. Step 3: Cross multiply
    183.12x = 274.52 × 142.72
  4. Step 4: Simplify right side
    183.12x = 39,179.16
  5. Step 5: Solve for x
    x = 39,179.16/183.12
  6. Step 6: Final answer
    x = 213.96

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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.