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Finding the Fourth Proportional to 79,086.12, 109,137.42 and 43,275.48

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Solution

The fourth proportional to 79,086.12, 109,137.42 and 43,275.48 is: 59,719.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,086.12 : 109,137.42 = 43,275.48 : x
  2. Step 2: Convert to fraction form
    79,086.12/109,137.42 = 43,275.48/x
  3. Step 3: Cross multiply
    79,086.12x = 109,137.42 × 43,275.48
  4. Step 4: Simplify right side
    79,086.12x = 4,722,974,236.46
  5. Step 5: Solve for x
    x = 4,722,974,236.46/79,086.12
  6. Step 6: Final answer
    x = 59,719.38

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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.