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Finding the Fourth Proportional to 121,638.69, 167,940.38 and 108,869.73

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Solution

The fourth proportional to 121,638.69, 167,940.38 and 108,869.73 is: 150,310.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,638.69 : 167,940.38 = 108,869.73 : x
  2. Step 2: Convert to fraction form
    121,638.69/167,940.38 = 108,869.73/x
  3. Step 3: Cross multiply
    121,638.69x = 167,940.38 × 108,869.73
  4. Step 4: Simplify right side
    121,638.69x = 18,283,623,282.35
  5. Step 5: Solve for x
    x = 18,283,623,282.35/121,638.69
  6. Step 6: Final answer
    x = 150,310.92

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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.