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Finding the Fourth Proportional to 217,755, 326,653.11 and 84,645.54

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Solution

The fourth proportional to 217,755, 326,653.11 and 84,645.54 is: 126,976.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,755 : 326,653.11 = 84,645.54 : x
  2. Step 2: Convert to fraction form
    217,755/326,653.11 = 84,645.54/x
  3. Step 3: Cross multiply
    217,755x = 326,653.11 × 84,645.54
  4. Step 4: Simplify right side
    217,755x = 27,649,728,888.63
  5. Step 5: Solve for x
    x = 27,649,728,888.63/217,755
  6. Step 6: Final answer
    x = 126,976.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.