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Finding the Fourth Proportional to 121,796.46, 168,078.63 and 68,081.58

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Solution

The fourth proportional to 121,796.46, 168,078.63 and 68,081.58 is: 93,952.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,796.46 : 168,078.63 = 68,081.58 : x
  2. Step 2: Convert to fraction form
    121,796.46/168,078.63 = 68,081.58/x
  3. Step 3: Cross multiply
    121,796.46x = 168,078.63 × 68,081.58
  4. Step 4: Simplify right side
    121,796.46x = 11,443,058,694.64
  5. Step 5: Solve for x
    x = 11,443,058,694.64/121,796.46
  6. Step 6: Final answer
    x = 93,952.31

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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.