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Finding the Fourth Proportional to 223.31, 308.15 and 123.73

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Solution

The fourth proportional to 223.31, 308.15 and 123.73 is: 170.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.31 : 308.15 = 123.73 : x
  2. Step 2: Convert to fraction form
    223.31/308.15 = 123.73/x
  3. Step 3: Cross multiply
    223.31x = 308.15 × 123.73
  4. Step 4: Simplify right side
    223.31x = 38,127.17
  5. Step 5: Solve for x
    x = 38,127.17/223.31
  6. Step 6: Final answer
    x = 170.73

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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.