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Finding the Fourth Proportional to 134.15, 201.38 and 85.23

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Solution

The fourth proportional to 134.15, 201.38 and 85.23 is: 127.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.15 : 201.38 = 85.23 : x
  2. Step 2: Convert to fraction form
    134.15/201.38 = 85.23/x
  3. Step 3: Cross multiply
    134.15x = 201.38 × 85.23
  4. Step 4: Simplify right side
    134.15x = 17,163.19
  5. Step 5: Solve for x
    x = 17,163.19/134.15
  6. Step 6: Final answer
    x = 127.95

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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.