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Finding the Fourth Proportional to 201.13, 277.62 and 113.86

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Solution

The fourth proportional to 201.13, 277.62 and 113.86 is: 157.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.13 : 277.62 = 113.86 : x
  2. Step 2: Convert to fraction form
    201.13/277.62 = 113.86/x
  3. Step 3: Cross multiply
    201.13x = 277.62 × 113.86
  4. Step 4: Simplify right side
    201.13x = 31,607.86
  5. Step 5: Solve for x
    x = 31,607.86/201.13
  6. Step 6: Final answer
    x = 157.15

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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.