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Finding the Fourth Proportional to 121,896.66, 168,217.56 and 68,182.50

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Solution

The fourth proportional to 121,896.66, 168,217.56 and 68,182.50 is: 94,091.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,896.66 : 168,217.56 = 68,182.50 : x
  2. Step 2: Convert to fraction form
    121,896.66/168,217.56 = 68,182.50/x
  3. Step 3: Cross multiply
    121,896.66x = 168,217.56 × 68,182.50
  4. Step 4: Simplify right side
    121,896.66x = 11,469,493,784.70
  5. Step 5: Solve for x
    x = 11,469,493,784.70/121,896.66
  6. Step 6: Final answer
    x = 94,091.94

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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.