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Finding the Fourth Proportional to 217,725.57, 326,626.63 and 99,408.87

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Solution

The fourth proportional to 217,725.57, 326,626.63 and 99,408.87 is: 149,130.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,725.57 : 326,626.63 = 99,408.87 : x
  2. Step 2: Convert to fraction form
    217,725.57/326,626.63 = 99,408.87/x
  3. Step 3: Cross multiply
    217,725.57x = 326,626.63 × 99,408.87
  4. Step 4: Simplify right side
    217,725.57x = 32,469,583,951.69
  5. Step 5: Solve for x
    x = 32,469,583,951.69/217,725.57
  6. Step 6: Final answer
    x = 149,130.78

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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.