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Finding the Fourth Proportional to 201.11, 277.75 and 139.10

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Solution

The fourth proportional to 201.11, 277.75 and 139.10 is: 192.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.11 : 277.75 = 139.10 : x
  2. Step 2: Convert to fraction form
    201.11/277.75 = 139.10/x
  3. Step 3: Cross multiply
    201.11x = 277.75 × 139.10
  4. Step 4: Simplify right side
    201.11x = 38,635.03
  5. Step 5: Solve for x
    x = 38,635.03/201.11
  6. Step 6: Final answer
    x = 192.11

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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.