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Finding the Fourth Proportional to 108,469.25, 149,687.57 and 66,027.78

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Solution

The fourth proportional to 108,469.25, 149,687.57 and 66,027.78 is: 91,118.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,469.25 : 149,687.57 = 66,027.78 : x
  2. Step 2: Convert to fraction form
    108,469.25/149,687.57 = 66,027.78/x
  3. Step 3: Cross multiply
    108,469.25x = 149,687.57 × 66,027.78
  4. Step 4: Simplify right side
    108,469.25x = 9,883,537,610.56
  5. Step 5: Solve for x
    x = 9,883,537,610.56/108,469.25
  6. Step 6: Final answer
    x = 91,118.33

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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.