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Finding the Fourth Proportional to 66,112.62, 99,172.11 and 21,738.39

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Solution

The fourth proportional to 66,112.62, 99,172.11 and 21,738.39 is: 32,608.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,112.62 : 99,172.11 = 21,738.39 : x
  2. Step 2: Convert to fraction form
    66,112.62/99,172.11 = 21,738.39/x
  3. Step 3: Cross multiply
    66,112.62x = 99,172.11 × 21,738.39
  4. Step 4: Simplify right side
    66,112.62x = 2,155,841,713.93
  5. Step 5: Solve for x
    x = 2,155,841,713.93/66,112.62
  6. Step 6: Final answer
    x = 32,608.63

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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.