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Finding the Fourth Proportional to 201.06, 277.49 and 142

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Solution

The fourth proportional to 201.06, 277.49 and 142 is: 195.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.06 : 277.49 = 142 : x
  2. Step 2: Convert to fraction form
    201.06/277.49 = 142/x
  3. Step 3: Cross multiply
    201.06x = 277.49 × 142
  4. Step 4: Simplify right side
    201.06x = 39,403.58
  5. Step 5: Solve for x
    x = 39,403.58/201.06
  6. Step 6: Final answer
    x = 195.98

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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.