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Finding the Fourth Proportional to 136.35, 203.45 and 131.49

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Solution

The fourth proportional to 136.35, 203.45 and 131.49 is: 196.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.35 : 203.45 = 131.49 : x
  2. Step 2: Convert to fraction form
    136.35/203.45 = 131.49/x
  3. Step 3: Cross multiply
    136.35x = 203.45 × 131.49
  4. Step 4: Simplify right side
    136.35x = 26,750.98
  5. Step 5: Solve for x
    x = 26,750.98/136.35
  6. Step 6: Final answer
    x = 196.19

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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.