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Finding the Fourth Proportional to 161,786.80, 242,680.20 and 127,961.20

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Solution

The fourth proportional to 161,786.80, 242,680.20 and 127,961.20 is: 191,941.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,786.80 : 242,680.20 = 127,961.20 : x
  2. Step 2: Convert to fraction form
    161,786.80/242,680.20 = 127,961.20/x
  3. Step 3: Cross multiply
    161,786.80x = 242,680.20 × 127,961.20
  4. Step 4: Simplify right side
    161,786.80x = 31,053,649,608.24
  5. Step 5: Solve for x
    x = 31,053,649,608.24/161,786.80
  6. Step 6: Final answer
    x = 191,941.80

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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.