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Finding the Fourth Proportional to 71,606.88, 98,815.68 and 39,778.56

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Solution

The fourth proportional to 71,606.88, 98,815.68 and 39,778.56 is: 54,893.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,606.88 : 98,815.68 = 39,778.56 : x
  2. Step 2: Convert to fraction form
    71,606.88/98,815.68 = 39,778.56/x
  3. Step 3: Cross multiply
    71,606.88x = 98,815.68 × 39,778.56
  4. Step 4: Simplify right side
    71,606.88x = 3,930,745,455.82
  5. Step 5: Solve for x
    x = 3,930,745,455.82/71,606.88
  6. Step 6: Final answer
    x = 54,893.40

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1.5x scale

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.