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Finding the Fourth Proportional to 121,712.49, 167,966.66 and 68,003.42

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Solution

The fourth proportional to 121,712.49, 167,966.66 and 68,003.42 is: 93,846.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,712.49 : 167,966.66 = 68,003.42 : x
  2. Step 2: Convert to fraction form
    121,712.49/167,966.66 = 68,003.42/x
  3. Step 3: Cross multiply
    121,712.49x = 167,966.66 × 68,003.42
  4. Step 4: Simplify right side
    121,712.49x = 11,422,306,656.15
  5. Step 5: Solve for x
    x = 11,422,306,656.15/121,712.49
  6. Step 6: Final answer
    x = 93,846.63

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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.