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Finding the Fourth Proportional to 271,920.86, 407,889.33 and 129,781.11

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Solution

The fourth proportional to 271,920.86, 407,889.33 and 129,781.11 is: 194,675.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    271,920.86 : 407,889.33 = 129,781.11 : x
  2. Step 2: Convert to fraction form
    271,920.86/407,889.33 = 129,781.11/x
  3. Step 3: Cross multiply
    271,920.86x = 407,889.33 × 129,781.11
  4. Step 4: Simplify right side
    271,920.86x = 52,936,330,004.56
  5. Step 5: Solve for x
    x = 52,936,330,004.56/271,920.86
  6. Step 6: Final answer
    x = 194,675.50

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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.