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Finding the Fourth Proportional to 66,821.22, 92,213.30 and 36,607.64

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Solution

The fourth proportional to 66,821.22, 92,213.30 and 36,607.64 is: 50,518.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,821.22 : 92,213.30 = 36,607.64 : x
  2. Step 2: Convert to fraction form
    66,821.22/92,213.30 = 36,607.64/x
  3. Step 3: Cross multiply
    66,821.22x = 92,213.30 × 36,607.64
  4. Step 4: Simplify right side
    66,821.22x = 3,375,711,289.61
  5. Step 5: Solve for x
    x = 3,375,711,289.61/66,821.22
  6. Step 6: Final answer
    x = 50,518.55

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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.