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Finding the Fourth Proportional to 66,223.56, 99,338.78 and 21,853.77

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Solution

The fourth proportional to 66,223.56, 99,338.78 and 21,853.77 is: 32,781.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,223.56 : 99,338.78 = 21,853.77 : x
  2. Step 2: Convert to fraction form
    66,223.56/99,338.78 = 21,853.77/x
  3. Step 3: Cross multiply
    66,223.56x = 99,338.78 × 21,853.77
  4. Step 4: Simplify right side
    66,223.56x = 2,170,926,680.39
  5. Step 5: Solve for x
    x = 2,170,926,680.39/66,223.56
  6. Step 6: Final answer
    x = 32,781.79

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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.