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Finding the Fourth Proportional to 135.96, 205.12 and 129.48

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Solution

The fourth proportional to 135.96, 205.12 and 129.48 is: 195.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.96 : 205.12 = 129.48 : x
  2. Step 2: Convert to fraction form
    135.96/205.12 = 129.48/x
  3. Step 3: Cross multiply
    135.96x = 205.12 × 129.48
  4. Step 4: Simplify right side
    135.96x = 26,558.94
  5. Step 5: Solve for x
    x = 26,558.94/135.96
  6. Step 6: Final answer
    x = 195.34

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.