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Finding the Fourth Proportional to 83,388.70, 115,093.78 and 76,663.67

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Solution

The fourth proportional to 83,388.70, 115,093.78 and 76,663.67 is: 105,811.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,388.70 : 115,093.78 = 76,663.67 : x
  2. Step 2: Convert to fraction form
    83,388.70/115,093.78 = 76,663.67/x
  3. Step 3: Cross multiply
    83,388.70x = 115,093.78 × 76,663.67
  4. Step 4: Simplify right side
    83,388.70x = 8,823,511,665.05
  5. Step 5: Solve for x
    x = 8,823,511,665.05/83,388.70
  6. Step 6: Final answer
    x = 105,811.84

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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.