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Finding the Fourth Proportional to 86,576.60, 129,864.90 and 68,861.90

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Solution

The fourth proportional to 86,576.60, 129,864.90 and 68,861.90 is: 103,292.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,576.60 : 129,864.90 = 68,861.90 : x
  2. Step 2: Convert to fraction form
    86,576.60/129,864.90 = 68,861.90/x
  3. Step 3: Cross multiply
    86,576.60x = 129,864.90 × 68,861.90
  4. Step 4: Simplify right side
    86,576.60x = 8,942,743,757.31
  5. Step 5: Solve for x
    x = 8,942,743,757.31/86,576.60
  6. Step 6: Final answer
    x = 103,292.85

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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.