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Finding the Fourth Proportional to 223.96, 309 and 136.66

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Solution

The fourth proportional to 223.96, 309 and 136.66 is: 188.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.96 : 309 = 136.66 : x
  2. Step 2: Convert to fraction form
    223.96/309 = 136.66/x
  3. Step 3: Cross multiply
    223.96x = 309 × 136.66
  4. Step 4: Simplify right side
    223.96x = 42,227.94
  5. Step 5: Solve for x
    x = 42,227.94/223.96
  6. Step 6: Final answer
    x = 188.55

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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.