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Finding the Fourth Proportional to 78,917.88, 108,906.01 and 43,107.90

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Solution

The fourth proportional to 78,917.88, 108,906.01 and 43,107.90 is: 59,488.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,917.88 : 108,906.01 = 43,107.90 : x
  2. Step 2: Convert to fraction form
    78,917.88/108,906.01 = 43,107.90/x
  3. Step 3: Cross multiply
    78,917.88x = 108,906.01 × 43,107.90
  4. Step 4: Simplify right side
    78,917.88x = 4,694,709,388.48
  5. Step 5: Solve for x
    x = 4,694,709,388.48/78,917.88
  6. Step 6: Final answer
    x = 59,488.54

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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.