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Finding the Fourth Proportional to 201.09, 277.43 and 122.39

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Solution

The fourth proportional to 201.09, 277.43 and 122.39 is: 168.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.09 : 277.43 = 122.39 : x
  2. Step 2: Convert to fraction form
    201.09/277.43 = 122.39/x
  3. Step 3: Cross multiply
    201.09x = 277.43 × 122.39
  4. Step 4: Simplify right side
    201.09x = 33,952.66
  5. Step 5: Solve for x
    x = 33,952.66/201.09
  6. Step 6: Final answer
    x = 168.84

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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.