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Finding the Fourth Proportional to 121,696, 167,940.48 and 68,704

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Solution

The fourth proportional to 121,696, 167,940.48 and 68,704 is: 94,811.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,696 : 167,940.48 = 68,704 : x
  2. Step 2: Convert to fraction form
    121,696/167,940.48 = 68,704/x
  3. Step 3: Cross multiply
    121,696x = 167,940.48 × 68,704
  4. Step 4: Simplify right side
    121,696x = 11,538,182,737.92
  5. Step 5: Solve for x
    x = 11,538,182,737.92/121,696
  6. Step 6: Final answer
    x = 94,811.52

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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.