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Finding the Fourth Proportional to 134.61, 201.71 and 91.18

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Solution

The fourth proportional to 134.61, 201.71 and 91.18 is: 136.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.61 : 201.71 = 91.18 : x
  2. Step 2: Convert to fraction form
    134.61/201.71 = 91.18/x
  3. Step 3: Cross multiply
    134.61x = 201.71 × 91.18
  4. Step 4: Simplify right side
    134.61x = 18,390.75
  5. Step 5: Solve for x
    x = 18,390.75/134.61
  6. Step 6: Final answer
    x = 136.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.