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Finding the Fourth Proportional to 201.22, 277.69 and 113.90

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Solution

The fourth proportional to 201.22, 277.69 and 113.90 is: 157.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.22 : 277.69 = 113.90 : x
  2. Step 2: Convert to fraction form
    201.22/277.69 = 113.90/x
  3. Step 3: Cross multiply
    201.22x = 277.69 × 113.90
  4. Step 4: Simplify right side
    201.22x = 31,628.89
  5. Step 5: Solve for x
    x = 31,628.89/201.22
  6. Step 6: Final answer
    x = 157.19

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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.