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Finding the Fourth Proportional to 81,081.65, 111,831.11 and 69,770.10

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Solution

The fourth proportional to 81,081.65, 111,831.11 and 69,770.10 is: 96,229.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,081.65 : 111,831.11 = 69,770.10 : x
  2. Step 2: Convert to fraction form
    81,081.65/111,831.11 = 69,770.10/x
  3. Step 3: Cross multiply
    81,081.65x = 111,831.11 × 69,770.10
  4. Step 4: Simplify right side
    81,081.65x = 7,802,467,378.96
  5. Step 5: Solve for x
    x = 7,802,467,378.96/81,081.65
  6. Step 6: Final answer
    x = 96,229.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.