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Finding the Fourth Proportional to 121,764.33, 168,034.23 and 68,049.30

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Solution

The fourth proportional to 121,764.33, 168,034.23 and 68,049.30 is: 93,907.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,764.33 : 168,034.23 = 68,049.30 : x
  2. Step 2: Convert to fraction form
    121,764.33/168,034.23 = 68,049.30/x
  3. Step 3: Cross multiply
    121,764.33x = 168,034.23 × 68,049.30
  4. Step 4: Simplify right side
    121,764.33x = 11,434,611,727.54
  5. Step 5: Solve for x
    x = 11,434,611,727.54/121,764.33
  6. Step 6: Final answer
    x = 93,907.73

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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.