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Finding the Fourth Proportional to 66,918.77, 100,393.01 and 20,168.27

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Solution

The fourth proportional to 66,918.77, 100,393.01 and 20,168.27 is: 30,256.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,918.77 : 100,393.01 = 20,168.27 : x
  2. Step 2: Convert to fraction form
    66,918.77/100,393.01 = 20,168.27/x
  3. Step 3: Cross multiply
    66,918.77x = 100,393.01 × 20,168.27
  4. Step 4: Simplify right side
    66,918.77x = 2,024,753,331.79
  5. Step 5: Solve for x
    x = 2,024,753,331.79/66,918.77
  6. Step 6: Final answer
    x = 30,256.88

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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.