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Finding the Fourth Proportional to 134.90, 201.17 and 129.09

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Solution

The fourth proportional to 134.90, 201.17 and 129.09 is: 192.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.90 : 201.17 = 129.09 : x
  2. Step 2: Convert to fraction form
    134.90/201.17 = 129.09/x
  3. Step 3: Cross multiply
    134.90x = 201.17 × 129.09
  4. Step 4: Simplify right side
    134.90x = 25,968.39
  5. Step 5: Solve for x
    x = 25,968.39/134.90
  6. Step 6: Final answer
    x = 192.51

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.