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Finding the Fourth Proportional to 85,694.46, 128,553.66 and 35,763.12

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Solution

The fourth proportional to 85,694.46, 128,553.66 and 35,763.12 is: 53,649.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,694.46 : 128,553.66 = 35,763.12 : x
  2. Step 2: Convert to fraction form
    85,694.46/128,553.66 = 35,763.12/x
  3. Step 3: Cross multiply
    85,694.46x = 128,553.66 × 35,763.12
  4. Step 4: Simplify right side
    85,694.46x = 4,597,479,790.20
  5. Step 5: Solve for x
    x = 4,597,479,790.20/85,694.46
  6. Step 6: Final answer
    x = 53,649.68

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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.