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Finding the Fourth Proportional to 134.57, 201.83 and 85.82

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Solution

The fourth proportional to 134.57, 201.83 and 85.82 is: 128.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.57 : 201.83 = 85.82 : x
  2. Step 2: Convert to fraction form
    134.57/201.83 = 85.82/x
  3. Step 3: Cross multiply
    134.57x = 201.83 × 85.82
  4. Step 4: Simplify right side
    134.57x = 17,319.61
  5. Step 5: Solve for x
    x = 17,319.61/134.57
  6. Step 6: Final answer
    x = 128.71

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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.