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Finding the Fourth Proportional to 201.17, 277.60 and 112.66

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Solution

The fourth proportional to 201.17, 277.60 and 112.66 is: 155.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.17 : 277.60 = 112.66 : x
  2. Step 2: Convert to fraction form
    201.17/277.60 = 112.66/x
  3. Step 3: Cross multiply
    201.17x = 277.60 × 112.66
  4. Step 4: Simplify right side
    201.17x = 31,272.46
  5. Step 5: Solve for x
    x = 31,272.46/201.17
  6. Step 6: Final answer
    x = 155.46

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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.