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Finding the Fourth Proportional to 121,914.82, 168,248.80 and 68,200.73

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Solution

The fourth proportional to 121,914.82, 168,248.80 and 68,200.73 is: 94,120.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,914.82 : 168,248.80 = 68,200.73 : x
  2. Step 2: Convert to fraction form
    121,914.82/168,248.80 = 68,200.73/x
  3. Step 3: Cross multiply
    121,914.82x = 168,248.80 × 68,200.73
  4. Step 4: Simplify right side
    121,914.82x = 11,474,691,419.33
  5. Step 5: Solve for x
    x = 11,474,691,419.33/121,914.82
  6. Step 6: Final answer
    x = 94,120.56

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1.5x scale

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.