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Finding the Fourth Proportional to 121,104.90, 166,949.64 and 80,200.41

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Solution

The fourth proportional to 121,104.90, 166,949.64 and 80,200.41 is: 110,560.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,104.90 : 166,949.64 = 80,200.41 : x
  2. Step 2: Convert to fraction form
    121,104.90/166,949.64 = 80,200.41/x
  3. Step 3: Cross multiply
    121,104.90x = 166,949.64 × 80,200.41
  4. Step 4: Simplify right side
    121,104.90x = 13,389,429,577.35
  5. Step 5: Solve for x
    x = 13,389,429,577.35/121,104.90
  6. Step 6: Final answer
    x = 110,560.59

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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.