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Finding the Fourth Proportional to 143.52, 213.75 and 141.73

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Solution

The fourth proportional to 143.52, 213.75 and 141.73 is: 211.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.52 : 213.75 = 141.73 : x
  2. Step 2: Convert to fraction form
    143.52/213.75 = 141.73/x
  3. Step 3: Cross multiply
    143.52x = 213.75 × 141.73
  4. Step 4: Simplify right side
    143.52x = 30,293.63
  5. Step 5: Solve for x
    x = 30,293.63/143.52
  6. Step 6: Final answer
    x = 211.07

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.