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Finding the Fourth Proportional to 223.54, 308.48 and 123.96

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Solution

The fourth proportional to 223.54, 308.48 and 123.96 is: 171.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.54 : 308.48 = 123.96 : x
  2. Step 2: Convert to fraction form
    223.54/308.48 = 123.96/x
  3. Step 3: Cross multiply
    223.54x = 308.48 × 123.96
  4. Step 4: Simplify right side
    223.54x = 38,239.72
  5. Step 5: Solve for x
    x = 38,239.72/223.54
  6. Step 6: Final answer
    x = 171.07

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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.