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Finding the Fourth Proportional to 121,897.82, 168,234.57 and 68,185.82

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Solution

The fourth proportional to 121,897.82, 168,234.57 and 68,185.82 is: 94,105.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,897.82 : 168,234.57 = 68,185.82 : x
  2. Step 2: Convert to fraction form
    121,897.82/168,234.57 = 68,185.82/x
  3. Step 3: Cross multiply
    121,897.82x = 168,234.57 × 68,185.82
  4. Step 4: Simplify right side
    121,897.82x = 11,471,212,107.80
  5. Step 5: Solve for x
    x = 11,471,212,107.80/121,897.82
  6. Step 6: Final answer
    x = 94,105.15

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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.