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Finding the Fourth Proportional to 121,170.20, 181,755.30 and 83,845.40

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Solution

The fourth proportional to 121,170.20, 181,755.30 and 83,845.40 is: 125,768.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,170.20 : 181,755.30 = 83,845.40 : x
  2. Step 2: Convert to fraction form
    121,170.20/181,755.30 = 83,845.40/x
  3. Step 3: Cross multiply
    121,170.20x = 181,755.30 × 83,845.40
  4. Step 4: Simplify right side
    121,170.20x = 15,239,345,830.62
  5. Step 5: Solve for x
    x = 15,239,345,830.62/121,170.20
  6. Step 6: Final answer
    x = 125,768.10

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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.