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Finding the Fourth Proportional to 201,105.20, 300,880.20 and 131,121.20

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Solution

The fourth proportional to 201,105.20, 300,880.20 and 131,121.20 is: 196,174.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,105.20 : 300,880.20 = 131,121.20 : x
  2. Step 2: Convert to fraction form
    201,105.20/300,880.20 = 131,121.20/x
  3. Step 3: Cross multiply
    201,105.20x = 300,880.20 × 131,121.20
  4. Step 4: Simplify right side
    201,105.20x = 39,451,772,880.24
  5. Step 5: Solve for x
    x = 39,451,772,880.24/201,105.20
  6. Step 6: Final answer
    x = 196,174.80

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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.