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Finding the Fourth Proportional to 83,066.80, 124,600.20 and 74,081.20

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Solution

The fourth proportional to 83,066.80, 124,600.20 and 74,081.20 is: 111,121.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,066.80 : 124,600.20 = 74,081.20 : x
  2. Step 2: Convert to fraction form
    83,066.80/124,600.20 = 74,081.20/x
  3. Step 3: Cross multiply
    83,066.80x = 124,600.20 × 74,081.20
  4. Step 4: Simplify right side
    83,066.80x = 9,230,532,336.24
  5. Step 5: Solve for x
    x = 9,230,532,336.24/83,066.80
  6. Step 6: Final answer
    x = 111,121.80

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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.