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Finding the Fourth Proportional to 223.76, 308.70 and 136.43

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Solution

The fourth proportional to 223.76, 308.70 and 136.43 is: 188.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.76 : 308.70 = 136.43 : x
  2. Step 2: Convert to fraction form
    223.76/308.70 = 136.43/x
  3. Step 3: Cross multiply
    223.76x = 308.70 × 136.43
  4. Step 4: Simplify right side
    223.76x = 42,114.40
  5. Step 5: Solve for x
    x = 42,114.40/223.76
  6. Step 6: Final answer
    x = 188.21

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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.