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Finding the Fourth Proportional to 447,756.57, 671,723.49 and 127,911.20

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Solution

The fourth proportional to 447,756.57, 671,723.49 and 127,911.20 is: 191,892.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,756.57 : 671,723.49 = 127,911.20 : x
  2. Step 2: Convert to fraction form
    447,756.57/671,723.49 = 127,911.20/x
  3. Step 3: Cross multiply
    447,756.57x = 671,723.49 × 127,911.20
  4. Step 4: Simplify right side
    447,756.57x = 85,920,954,795.14
  5. Step 5: Solve for x
    x = 85,920,954,795.14/447,756.57
  6. Step 6: Final answer
    x = 191,892.11

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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.