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Finding the Fourth Proportional to 136.70, 203.55 and 135.18

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Solution

The fourth proportional to 136.70, 203.55 and 135.18 is: 201.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.70 : 203.55 = 135.18 : x
  2. Step 2: Convert to fraction form
    136.70/203.55 = 135.18/x
  3. Step 3: Cross multiply
    136.70x = 203.55 × 135.18
  4. Step 4: Simplify right side
    136.70x = 27,516.40
  5. Step 5: Solve for x
    x = 27,516.40/136.70
  6. Step 6: Final answer
    x = 201.30

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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.