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Finding the Fourth Proportional to 123,963.78, 171,071.15 and 67,375.29

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Solution

The fourth proportional to 123,963.78, 171,071.15 and 67,375.29 is: 92,978.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,963.78 : 171,071.15 = 67,375.29 : x
  2. Step 2: Convert to fraction form
    123,963.78/171,071.15 = 67,375.29/x
  3. Step 3: Cross multiply
    123,963.78x = 171,071.15 × 67,375.29
  4. Step 4: Simplify right side
    123,963.78x = 11,525,968,005.01
  5. Step 5: Solve for x
    x = 11,525,968,005.01/123,963.78
  6. Step 6: Final answer
    x = 92,978.51

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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.