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Finding the Fourth Proportional to 83,398.70, 125,111.00 and 28,007.66

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Solution

The fourth proportional to 83,398.70, 125,111.00 and 28,007.66 is: 42,015.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,398.70 : 125,111.00 = 28,007.66 : x
  2. Step 2: Convert to fraction form
    83,398.70/125,111.00 = 28,007.66/x
  3. Step 3: Cross multiply
    83,398.70x = 125,111.00 × 28,007.66
  4. Step 4: Simplify right side
    83,398.70x = 3,504,065,584.67
  5. Step 5: Solve for x
    x = 3,504,065,584.67/83,398.70
  6. Step 6: Final answer
    x = 42,015.83

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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.