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Finding the Fourth Proportional to 201.13, 277.56 and 111.40

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Solution

The fourth proportional to 201.13, 277.56 and 111.40 is: 153.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.13 : 277.56 = 111.40 : x
  2. Step 2: Convert to fraction form
    201.13/277.56 = 111.40/x
  3. Step 3: Cross multiply
    201.13x = 277.56 × 111.40
  4. Step 4: Simplify right side
    201.13x = 30,920.18
  5. Step 5: Solve for x
    x = 30,920.18/201.13
  6. Step 6: Final answer
    x = 153.73

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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.