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Finding the Fourth Proportional to 79,720.43, 110,014.04 and 43,912.85

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Solution

The fourth proportional to 79,720.43, 110,014.04 and 43,912.85 is: 60,599.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,720.43 : 110,014.04 = 43,912.85 : x
  2. Step 2: Convert to fraction form
    79,720.43/110,014.04 = 43,912.85/x
  3. Step 3: Cross multiply
    79,720.43x = 110,014.04 × 43,912.85
  4. Step 4: Simplify right side
    79,720.43x = 4,831,029,266.78
  5. Step 5: Solve for x
    x = 4,831,029,266.78/79,720.43
  6. Step 6: Final answer
    x = 60,599.64

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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.