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Finding the Fourth Proportional to 217,081.89, 325,669.61 and 67,319.17

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Solution

The fourth proportional to 217,081.89, 325,669.61 and 67,319.17 is: 100,993.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,081.89 : 325,669.61 = 67,319.17 : x
  2. Step 2: Convert to fraction form
    217,081.89/325,669.61 = 67,319.17/x
  3. Step 3: Cross multiply
    217,081.89x = 325,669.61 × 67,319.17
  4. Step 4: Simplify right side
    217,081.89x = 21,923,807,193.55
  5. Step 5: Solve for x
    x = 21,923,807,193.55/217,081.89
  6. Step 6: Final answer
    x = 100,993.26

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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.