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Finding the Fourth Proportional to 163.74, 225.95 and 93.79

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Solution

The fourth proportional to 163.74, 225.95 and 93.79 is: 129.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.74 : 225.95 = 93.79 : x
  2. Step 2: Convert to fraction form
    163.74/225.95 = 93.79/x
  3. Step 3: Cross multiply
    163.74x = 225.95 × 93.79
  4. Step 4: Simplify right side
    163.74x = 21,191.85
  5. Step 5: Solve for x
    x = 21,191.85/163.74
  6. Step 6: Final answer
    x = 129.42

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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.