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Finding the Fourth Proportional to 121,403.80, 167,528.55 and 67,691.62

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Solution

The fourth proportional to 121,403.80, 167,528.55 and 67,691.62 is: 93,409.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,403.80 : 167,528.55 = 67,691.62 : x
  2. Step 2: Convert to fraction form
    121,403.80/167,528.55 = 67,691.62/x
  3. Step 3: Cross multiply
    121,403.80x = 167,528.55 × 67,691.62
  4. Step 4: Simplify right side
    121,403.80x = 11,340,278,945.75
  5. Step 5: Solve for x
    x = 11,340,278,945.75/121,403.80
  6. Step 6: Final answer
    x = 93,409.59

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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.