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Finding the Fourth Proportional to 121,449.28, 167,597.76 and 67,738.72

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Solution

The fourth proportional to 121,449.28, 167,597.76 and 67,738.72 is: 93,478.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,449.28 : 167,597.76 = 67,738.72 : x
  2. Step 2: Convert to fraction form
    121,449.28/167,597.76 = 67,738.72/x
  3. Step 3: Cross multiply
    121,449.28x = 167,597.76 × 67,738.72
  4. Step 4: Simplify right side
    121,449.28x = 11,352,857,737.27
  5. Step 5: Solve for x
    x = 11,352,857,737.27/121,449.28
  6. Step 6: Final answer
    x = 93,478.18

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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.