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Finding the Fourth Proportional to 121,626.60, 167,843.16 and 67,912.56

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Solution

The fourth proportional to 121,626.60, 167,843.16 and 67,912.56 is: 93,718.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,626.60 : 167,843.16 = 67,912.56 : x
  2. Step 2: Convert to fraction form
    121,626.60/167,843.16 = 67,912.56/x
  3. Step 3: Cross multiply
    121,626.60x = 167,843.16 × 67,912.56
  4. Step 4: Simplify right side
    121,626.60x = 11,398,658,674.09
  5. Step 5: Solve for x
    x = 11,398,658,674.09/121,626.60
  6. Step 6: Final answer
    x = 93,718.47

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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.