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Finding the Fourth Proportional to 166,640.50, 229,963.92 and 91,189

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Solution

The fourth proportional to 166,640.50, 229,963.92 and 91,189 is: 125,840.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    166,640.50 : 229,963.92 = 91,189 : x
  2. Step 2: Convert to fraction form
    166,640.50/229,963.92 = 91,189/x
  3. Step 3: Cross multiply
    166,640.50x = 229,963.92 × 91,189
  4. Step 4: Simplify right side
    166,640.50x = 20,970,179,900.88
  5. Step 5: Solve for x
    x = 20,970,179,900.88/166,640.50
  6. Step 6: Final answer
    x = 125,840.84

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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.