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Finding the Fourth Proportional to 201.14, 277.18 and 142.82

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Solution

The fourth proportional to 201.14, 277.18 and 142.82 is: 196.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.14 : 277.18 = 142.82 : x
  2. Step 2: Convert to fraction form
    201.14/277.18 = 142.82/x
  3. Step 3: Cross multiply
    201.14x = 277.18 × 142.82
  4. Step 4: Simplify right side
    201.14x = 39,586.85
  5. Step 5: Solve for x
    x = 39,586.85/201.14
  6. Step 6: Final answer
    x = 196.81

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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.