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Finding the Fourth Proportional to 275,480.20, 413,147.40 and 85,940.20

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Solution

The fourth proportional to 275,480.20, 413,147.40 and 85,940.20 is: 128,887.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,480.20 : 413,147.40 = 85,940.20 : x
  2. Step 2: Convert to fraction form
    275,480.20/413,147.40 = 85,940.20/x
  3. Step 3: Cross multiply
    275,480.20x = 413,147.40 × 85,940.20
  4. Step 4: Simplify right side
    275,480.20x = 35,505,970,185.48
  5. Step 5: Solve for x
    x = 35,505,970,185.48/275,480.20
  6. Step 6: Final answer
    x = 128,887.56

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1.5x scale

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.