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Finding the Fourth Proportional to 108,786.85, 150,128.44 and 61,043.73

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Solution

The fourth proportional to 108,786.85, 150,128.44 and 61,043.73 is: 84,241.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,786.85 : 150,128.44 = 61,043.73 : x
  2. Step 2: Convert to fraction form
    108,786.85/150,128.44 = 61,043.73/x
  3. Step 3: Cross multiply
    108,786.85x = 150,128.44 × 61,043.73
  4. Step 4: Simplify right side
    108,786.85x = 9,164,399,241.09
  5. Step 5: Solve for x
    x = 9,164,399,241.09/108,786.85
  6. Step 6: Final answer
    x = 84,241.79

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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.