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Finding the Fourth Proportional to 123,993.28, 171,112.43 and 67,405.87

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Solution

The fourth proportional to 123,993.28, 171,112.43 and 67,405.87 is: 93,021.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,993.28 : 171,112.43 = 67,405.87 : x
  2. Step 2: Convert to fraction form
    123,993.28/171,112.43 = 67,405.87/x
  3. Step 3: Cross multiply
    123,993.28x = 171,112.43 × 67,405.87
  4. Step 4: Simplify right side
    123,993.28x = 11,533,982,211.96
  5. Step 5: Solve for x
    x = 11,533,982,211.96/123,993.28
  6. Step 6: Final answer
    x = 93,021.03

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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.