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Finding the Fourth Proportional to 201.16, 277.44 and 139.09

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Solution

The fourth proportional to 201.16, 277.44 and 139.09 is: 191.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.16 : 277.44 = 139.09 : x
  2. Step 2: Convert to fraction form
    201.16/277.44 = 139.09/x
  3. Step 3: Cross multiply
    201.16x = 277.44 × 139.09
  4. Step 4: Simplify right side
    201.16x = 38,589.48
  5. Step 5: Solve for x
    x = 38,589.48/201.16
  6. Step 6: Final answer
    x = 191.84

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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.