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Finding the Fourth Proportional to 86,591.50, 119,578.80 and 81,873.99

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Solution

The fourth proportional to 86,591.50, 119,578.80 and 81,873.99 is: 113,064.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,591.50 : 119,578.80 = 81,873.99 : x
  2. Step 2: Convert to fraction form
    86,591.50/119,578.80 = 81,873.99/x
  3. Step 3: Cross multiply
    86,591.50x = 119,578.80 × 81,873.99
  4. Step 4: Simplify right side
    86,591.50x = 9,790,393,494.60
  5. Step 5: Solve for x
    x = 9,790,393,494.60/86,591.50
  6. Step 6: Final answer
    x = 113,064.14

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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.