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Finding the Fourth Proportional to 134.81, 200.87 and 129.11

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Solution

The fourth proportional to 134.81, 200.87 and 129.11 is: 192.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.81 : 200.87 = 129.11 : x
  2. Step 2: Convert to fraction form
    134.81/200.87 = 129.11/x
  3. Step 3: Cross multiply
    134.81x = 200.87 × 129.11
  4. Step 4: Simplify right side
    134.81x = 25,933.16
  5. Step 5: Solve for x
    x = 25,933.16/134.81
  6. Step 6: Final answer
    x = 192.37

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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.