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Finding the Fourth Proportional to 121,694.97, 167,927.01 and 67,978.83

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Solution

The fourth proportional to 121,694.97, 167,927.01 and 67,978.83 is: 93,804.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,694.97 : 167,927.01 = 67,978.83 : x
  2. Step 2: Convert to fraction form
    121,694.97/167,927.01 = 67,978.83/x
  3. Step 3: Cross multiply
    121,694.97x = 167,927.01 × 67,978.83
  4. Step 4: Simplify right side
    121,694.97x = 11,415,481,665.20
  5. Step 5: Solve for x
    x = 11,415,481,665.20/121,694.97
  6. Step 6: Final answer
    x = 93,804.06

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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.