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Finding the Fourth Proportional to 275,478.20, 413,144.40 and 85,938.20

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Solution

The fourth proportional to 275,478.20, 413,144.40 and 85,938.20 is: 128,884.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,478.20 : 413,144.40 = 85,938.20 : x
  2. Step 2: Convert to fraction form
    275,478.20/413,144.40 = 85,938.20/x
  3. Step 3: Cross multiply
    275,478.20x = 413,144.40 × 85,938.20
  4. Step 4: Simplify right side
    275,478.20x = 35,504,886,076.08
  5. Step 5: Solve for x
    x = 35,504,886,076.08/275,478.20
  6. Step 6: Final answer
    x = 128,884.56

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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.