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Finding the Fourth Proportional to 134.71, 201.89 and 85.94

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Solution

The fourth proportional to 134.71, 201.89 and 85.94 is: 128.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.71 : 201.89 = 85.94 : x
  2. Step 2: Convert to fraction form
    134.71/201.89 = 85.94/x
  3. Step 3: Cross multiply
    134.71x = 201.89 × 85.94
  4. Step 4: Simplify right side
    134.71x = 17,351.31
  5. Step 5: Solve for x
    x = 17,351.31/134.71
  6. Step 6: Final answer
    x = 128.80

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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.