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Finding the Fourth Proportional to 83,861.56, 125,490.84 and 61,619.68

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Solution

The fourth proportional to 83,861.56, 125,490.84 and 61,619.68 is: 92,207.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,861.56 : 125,490.84 = 61,619.68 : x
  2. Step 2: Convert to fraction form
    83,861.56/125,490.84 = 61,619.68/x
  3. Step 3: Cross multiply
    83,861.56x = 125,490.84 × 61,619.68
  4. Step 4: Simplify right side
    83,861.56x = 7,732,705,403.73
  5. Step 5: Solve for x
    x = 7,732,705,403.73/83,861.56
  6. Step 6: Final answer
    x = 92,207.98

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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.