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Finding the Fourth Proportional to 71,591.40, 98,796.24 and 39,759.48

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Solution

The fourth proportional to 71,591.40, 98,796.24 and 39,759.48 is: 54,868.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,591.40 : 98,796.24 = 39,759.48 : x
  2. Step 2: Convert to fraction form
    71,591.40/98,796.24 = 39,759.48/x
  3. Step 3: Cross multiply
    71,591.40x = 98,796.24 × 39,759.48
  4. Step 4: Simplify right side
    71,591.40x = 3,928,087,128.36
  5. Step 5: Solve for x
    x = 3,928,087,128.36/71,591.40
  6. Step 6: Final answer
    x = 54,868.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.