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Finding the Fourth Proportional to 134.76, 201.81 and 86.04

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Solution

The fourth proportional to 134.76, 201.81 and 86.04 is: 128.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.76 : 201.81 = 86.04 : x
  2. Step 2: Convert to fraction form
    134.76/201.81 = 86.04/x
  3. Step 3: Cross multiply
    134.76x = 201.81 × 86.04
  4. Step 4: Simplify right side
    134.76x = 17,363.73
  5. Step 5: Solve for x
    x = 17,363.73/134.76
  6. Step 6: Final answer
    x = 128.85

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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.