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Finding the Fourth Proportional to 75,246.78, 103,840.56 and 41,712.78

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Solution

The fourth proportional to 75,246.78, 103,840.56 and 41,712.78 is: 57,563.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,246.78 : 103,840.56 = 41,712.78 : x
  2. Step 2: Convert to fraction form
    75,246.78/103,840.56 = 41,712.78/x
  3. Step 3: Cross multiply
    75,246.78x = 103,840.56 × 41,712.78
  4. Step 4: Simplify right side
    75,246.78x = 4,331,478,434.36
  5. Step 5: Solve for x
    x = 4,331,478,434.36/75,246.78
  6. Step 6: Final answer
    x = 57,563.64

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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.