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Finding the Fourth Proportional to 218,407.89, 327,611.54 and 68,661.27

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Solution

The fourth proportional to 218,407.89, 327,611.54 and 68,661.27 is: 102,991.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,407.89 : 327,611.54 = 68,661.27 : x
  2. Step 2: Convert to fraction form
    218,407.89/327,611.54 = 68,661.27/x
  3. Step 3: Cross multiply
    218,407.89x = 327,611.54 × 68,661.27
  4. Step 4: Simplify right side
    218,407.89x = 22,494,224,059.75
  5. Step 5: Solve for x
    x = 22,494,224,059.75/218,407.89
  6. Step 6: Final answer
    x = 102,991.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.