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Finding the Fourth Proportional to 223.49, 308.45 and 136.19

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Solution

The fourth proportional to 223.49, 308.45 and 136.19 is: 187.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.49 : 308.45 = 136.19 : x
  2. Step 2: Convert to fraction form
    223.49/308.45 = 136.19/x
  3. Step 3: Cross multiply
    223.49x = 308.45 × 136.19
  4. Step 4: Simplify right side
    223.49x = 42,007.81
  5. Step 5: Solve for x
    x = 42,007.81/223.49
  6. Step 6: Final answer
    x = 187.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.