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Finding the Fourth Proportional to 85,805.68, 117,780.42 and 76,163.44

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Solution

The fourth proportional to 85,805.68, 117,780.42 and 76,163.44 is: 104,545.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,805.68 : 117,780.42 = 76,163.44 : x
  2. Step 2: Convert to fraction form
    85,805.68/117,780.42 = 76,163.44/x
  3. Step 3: Cross multiply
    85,805.68x = 117,780.42 × 76,163.44
  4. Step 4: Simplify right side
    85,805.68x = 8,970,561,951.84
  5. Step 5: Solve for x
    x = 8,970,561,951.84/85,805.68
  6. Step 6: Final answer
    x = 104,545.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.