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Finding the Fourth Proportional to 86,191.78, 129,198.50 and 32,869.42

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Solution

The fourth proportional to 86,191.78, 129,198.50 and 32,869.42 is: 49,270.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,191.78 : 129,198.50 = 32,869.42 : x
  2. Step 2: Convert to fraction form
    86,191.78/129,198.50 = 32,869.42/x
  3. Step 3: Cross multiply
    86,191.78x = 129,198.50 × 32,869.42
  4. Step 4: Simplify right side
    86,191.78x = 4,246,679,759.87
  5. Step 5: Solve for x
    x = 4,246,679,759.87/86,191.78
  6. Step 6: Final answer
    x = 49,270.12

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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.