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Finding the Fourth Proportional to 185.88, 279.12 and 142.56

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Solution

The fourth proportional to 185.88, 279.12 and 142.56 is: 214.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.88 : 279.12 = 142.56 : x
  2. Step 2: Convert to fraction form
    185.88/279.12 = 142.56/x
  3. Step 3: Cross multiply
    185.88x = 279.12 × 142.56
  4. Step 4: Simplify right side
    185.88x = 39,791.35
  5. Step 5: Solve for x
    x = 39,791.35/185.88
  6. Step 6: Final answer
    x = 214.07

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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.