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Finding the Fourth Proportional to 85,682.88, 128,539.44 and 33,087.96

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Solution

The fourth proportional to 85,682.88, 128,539.44 and 33,087.96 is: 49,637.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,682.88 : 128,539.44 = 33,087.96 : x
  2. Step 2: Convert to fraction form
    85,682.88/128,539.44 = 33,087.96/x
  3. Step 3: Cross multiply
    85,682.88x = 128,539.44 × 33,087.96
  4. Step 4: Simplify right side
    85,682.88x = 4,253,107,849.14
  5. Step 5: Solve for x
    x = 4,253,107,849.14/85,682.88
  6. Step 6: Final answer
    x = 49,637.78

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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.