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Finding the Fourth Proportional to 66,812.80, 92,209.44 and 38,519.50

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Solution

The fourth proportional to 66,812.80, 92,209.44 and 38,519.50 is: 53,161.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,812.80 : 92,209.44 = 38,519.50 : x
  2. Step 2: Convert to fraction form
    66,812.80/92,209.44 = 38,519.50/x
  3. Step 3: Cross multiply
    66,812.80x = 92,209.44 × 38,519.50
  4. Step 4: Simplify right side
    66,812.80x = 3,551,861,524.08
  5. Step 5: Solve for x
    x = 3,551,861,524.08/66,812.80
  6. Step 6: Final answer
    x = 53,161.39

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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.