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Finding the Fourth Proportional to 79,485.55, 109,692.09 and 43,676.47

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Solution

The fourth proportional to 79,485.55, 109,692.09 and 43,676.47 is: 60,274.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,485.55 : 109,692.09 = 43,676.47 : x
  2. Step 2: Convert to fraction form
    79,485.55/109,692.09 = 43,676.47/x
  3. Step 3: Cross multiply
    79,485.55x = 109,692.09 × 43,676.47
  4. Step 4: Simplify right side
    79,485.55x = 4,790,963,278.12
  5. Step 5: Solve for x
    x = 4,790,963,278.12/79,485.55
  6. Step 6: Final answer
    x = 60,274.64

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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.