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Finding the Fourth Proportional to 217,874.45, 300,694.81 and 122,381.12

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Solution

The fourth proportional to 217,874.45, 300,694.81 and 122,381.12 is: 168,901.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,874.45 : 300,694.81 = 122,381.12 : x
  2. Step 2: Convert to fraction form
    217,874.45/300,694.81 = 122,381.12/x
  3. Step 3: Cross multiply
    217,874.45x = 300,694.81 × 122,381.12
  4. Step 4: Simplify right side
    217,874.45x = 36,799,367,625.99
  5. Step 5: Solve for x
    x = 36,799,367,625.99/217,874.45
  6. Step 6: Final answer
    x = 168,901.71

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1.5x scale

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.