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Finding the Fourth Proportional to 123,912.89, 170,997.68 and 67,323.86

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Solution

The fourth proportional to 123,912.89, 170,997.68 and 67,323.86 is: 92,905.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,912.89 : 170,997.68 = 67,323.86 : x
  2. Step 2: Convert to fraction form
    123,912.89/170,997.68 = 67,323.86/x
  3. Step 3: Cross multiply
    123,912.89x = 170,997.68 × 67,323.86
  4. Step 4: Simplify right side
    123,912.89x = 11,512,223,868.64
  5. Step 5: Solve for x
    x = 11,512,223,868.64/123,912.89
  6. Step 6: Final answer
    x = 92,905.78

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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.