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Finding the Fourth Proportional to 121,085.56, 167,078.38 and 67,369.20

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Solution

The fourth proportional to 121,085.56, 167,078.38 and 67,369.20 is: 92,958.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,085.56 : 167,078.38 = 67,369.20 : x
  2. Step 2: Convert to fraction form
    121,085.56/167,078.38 = 67,369.20/x
  3. Step 3: Cross multiply
    121,085.56x = 167,078.38 × 67,369.20
  4. Step 4: Simplify right side
    121,085.56x = 11,255,936,797.90
  5. Step 5: Solve for x
    x = 11,255,936,797.90/121,085.56
  6. Step 6: Final answer
    x = 92,958.54

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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.