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Finding the Fourth Proportional to 121,734.73, 167,993.57 and 68,019.78

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Solution

The fourth proportional to 121,734.73, 167,993.57 and 68,019.78 is: 93,867.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,734.73 : 167,993.57 = 68,019.78 : x
  2. Step 2: Convert to fraction form
    121,734.73/167,993.57 = 68,019.78/x
  3. Step 3: Cross multiply
    121,734.73x = 167,993.57 × 68,019.78
  4. Step 4: Simplify right side
    121,734.73x = 11,426,885,672.81
  5. Step 5: Solve for x
    x = 11,426,885,672.81/121,734.73
  6. Step 6: Final answer
    x = 93,867.10

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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.