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Finding the Fourth Proportional to 206,560.74, 309,841.11 and 66,417.78

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Solution

The fourth proportional to 206,560.74, 309,841.11 and 66,417.78 is: 99,626.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,560.74 : 309,841.11 = 66,417.78 : x
  2. Step 2: Convert to fraction form
    206,560.74/309,841.11 = 66,417.78/x
  3. Step 3: Cross multiply
    206,560.74x = 309,841.11 × 66,417.78
  4. Step 4: Simplify right side
    206,560.74x = 20,578,958,678.94
  5. Step 5: Solve for x
    x = 20,578,958,678.94/206,560.74
  6. Step 6: Final answer
    x = 99,626.67

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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.