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Finding the Fourth Proportional to 92,824.80, 139,237.20 and 66,775.20

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Solution

The fourth proportional to 92,824.80, 139,237.20 and 66,775.20 is: 100,162.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,824.80 : 139,237.20 = 66,775.20 : x
  2. Step 2: Convert to fraction form
    92,824.80/139,237.20 = 66,775.20/x
  3. Step 3: Cross multiply
    92,824.80x = 139,237.20 × 66,775.20
  4. Step 4: Simplify right side
    92,824.80x = 9,297,591,877.44
  5. Step 5: Solve for x
    x = 9,297,591,877.44/92,824.80
  6. Step 6: Final answer
    x = 100,162.80

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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.