Home / 54,239.40-81,286.20-38,638.80

Finding the Fourth Proportional to 54,239.40, 81,286.20 and 38,638.80

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Solution

The fourth proportional to 54,239.40, 81,286.20 and 38,638.80 is: 57,906.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,239.40 : 81,286.20 = 38,638.80 : x
  2. Step 2: Convert to fraction form
    54,239.40/81,286.20 = 38,638.80/x
  3. Step 3: Cross multiply
    54,239.40x = 81,286.20 × 38,638.80
  4. Step 4: Simplify right side
    54,239.40x = 3,140,801,224.56
  5. Step 5: Solve for x
    x = 3,140,801,224.56/54,239.40
  6. Step 6: Final answer
    x = 57,906.27

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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.