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Finding the Fourth Proportional to 123,940.14, 171,040.64 and 67,351.51

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Solution

The fourth proportional to 123,940.14, 171,040.64 and 67,351.51 is: 92,946.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,940.14 : 171,040.64 = 67,351.51 : x
  2. Step 2: Convert to fraction form
    123,940.14/171,040.64 = 67,351.51/x
  3. Step 3: Cross multiply
    123,940.14x = 171,040.64 × 67,351.51
  4. Step 4: Simplify right side
    123,940.14x = 11,519,845,375.37
  5. Step 5: Solve for x
    x = 11,519,845,375.37/123,940.14
  6. Step 6: Final answer
    x = 92,946.85

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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.