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Finding the Fourth Proportional to 201,131.20, 301,696.80 and 131,147.20

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Solution

The fourth proportional to 201,131.20, 301,696.80 and 131,147.20 is: 196,720.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,131.20 : 301,696.80 = 131,147.20 : x
  2. Step 2: Convert to fraction form
    201,131.20/301,696.80 = 131,147.20/x
  3. Step 3: Cross multiply
    201,131.20x = 301,696.80 × 131,147.20
  4. Step 4: Simplify right side
    201,131.20x = 39,566,690,568.96
  5. Step 5: Solve for x
    x = 39,566,690,568.96/201,131.20
  6. Step 6: Final answer
    x = 196,720.80

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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.