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Finding the Fourth Proportional to 85,939.60, 118,654.46 and 65,760.44

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Solution

The fourth proportional to 85,939.60, 118,654.46 and 65,760.44 is: 90,793.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,939.60 : 118,654.46 = 65,760.44 : x
  2. Step 2: Convert to fraction form
    85,939.60/118,654.46 = 65,760.44/x
  3. Step 3: Cross multiply
    85,939.60x = 118,654.46 × 65,760.44
  4. Step 4: Simplify right side
    85,939.60x = 7,802,769,497.56
  5. Step 5: Solve for x
    x = 7,802,769,497.56/85,939.60
  6. Step 6: Final answer
    x = 90,793.64

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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.