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Finding the Fourth Proportional to 136.36, 204.37 and 99.71

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Solution

The fourth proportional to 136.36, 204.37 and 99.71 is: 149.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.36 : 204.37 = 99.71 : x
  2. Step 2: Convert to fraction form
    136.36/204.37 = 99.71/x
  3. Step 3: Cross multiply
    136.36x = 204.37 × 99.71
  4. Step 4: Simplify right side
    136.36x = 20,376.46
  5. Step 5: Solve for x
    x = 20,376.46/136.36
  6. Step 6: Final answer
    x = 149.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.