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Finding the Fourth Proportional to 121,796.76, 168,076.57 and 68,088.09

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Solution

The fourth proportional to 121,796.76, 168,076.57 and 68,088.09 is: 93,959.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,796.76 : 168,076.57 = 68,088.09 : x
  2. Step 2: Convert to fraction form
    121,796.76/168,076.57 = 68,088.09/x
  3. Step 3: Cross multiply
    121,796.76x = 168,076.57 × 68,088.09
  4. Step 4: Simplify right side
    121,796.76x = 11,444,013,212.78
  5. Step 5: Solve for x
    x = 11,444,013,212.78/121,796.76
  6. Step 6: Final answer
    x = 93,959.91

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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.