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Finding the Fourth Proportional to 134.16, 201.45 and 129

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Solution

The fourth proportional to 134.16, 201.45 and 129 is: 193.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.16 : 201.45 = 129 : x
  2. Step 2: Convert to fraction form
    134.16/201.45 = 129/x
  3. Step 3: Cross multiply
    134.16x = 201.45 × 129
  4. Step 4: Simplify right side
    134.16x = 25,987.05
  5. Step 5: Solve for x
    x = 25,987.05/134.16
  6. Step 6: Final answer
    x = 193.70

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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.