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Finding the Fourth Proportional to 136.49, 203.24 and 129.49

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Solution

The fourth proportional to 136.49, 203.24 and 129.49 is: 192.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.49 : 203.24 = 129.49 : x
  2. Step 2: Convert to fraction form
    136.49/203.24 = 129.49/x
  3. Step 3: Cross multiply
    136.49x = 203.24 × 129.49
  4. Step 4: Simplify right side
    136.49x = 26,317.36
  5. Step 5: Solve for x
    x = 26,317.36/136.49
  6. Step 6: Final answer
    x = 192.82

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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.