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Finding the Fourth Proportional to 178.91, 246.99 and 123.73

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Solution

The fourth proportional to 178.91, 246.99 and 123.73 is: 170.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.91 : 246.99 = 123.73 : x
  2. Step 2: Convert to fraction form
    178.91/246.99 = 123.73/x
  3. Step 3: Cross multiply
    178.91x = 246.99 × 123.73
  4. Step 4: Simplify right side
    178.91x = 30,559.46
  5. Step 5: Solve for x
    x = 30,559.46/178.91
  6. Step 6: Final answer
    x = 170.81

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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.