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Finding the Fourth Proportional to 121,884.49, 168,199.62 and 68,169.46

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Solution

The fourth proportional to 121,884.49, 168,199.62 and 68,169.46 is: 94,073.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,884.49 : 168,199.62 = 68,169.46 : x
  2. Step 2: Convert to fraction form
    121,884.49/168,199.62 = 68,169.46/x
  3. Step 3: Cross multiply
    121,884.49x = 168,199.62 × 68,169.46
  4. Step 4: Simplify right side
    121,884.49x = 11,466,077,290.30
  5. Step 5: Solve for x
    x = 11,466,077,290.30/121,884.49
  6. Step 6: Final answer
    x = 94,073.31

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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.