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Finding the Fourth Proportional to 121,764.87, 168,034.50 and 68,049.27

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Solution

The fourth proportional to 121,764.87, 168,034.50 and 68,049.27 is: 93,907.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,764.87 : 168,034.50 = 68,049.27 : x
  2. Step 2: Convert to fraction form
    121,764.87/168,034.50 = 68,049.27/x
  3. Step 3: Cross multiply
    121,764.87x = 168,034.50 × 68,049.27
  4. Step 4: Simplify right side
    121,764.87x = 11,434,625,059.82
  5. Step 5: Solve for x
    x = 11,434,625,059.82/121,764.87
  6. Step 6: Final answer
    x = 93,907.42

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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.