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Finding the Fourth Proportional to 80,791.80, 121,362.30 and 68,336.52

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Solution

The fourth proportional to 80,791.80, 121,362.30 and 68,336.52 is: 102,652.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,791.80 : 121,362.30 = 68,336.52 : x
  2. Step 2: Convert to fraction form
    80,791.80/121,362.30 = 68,336.52/x
  3. Step 3: Cross multiply
    80,791.80x = 121,362.30 × 68,336.52
  4. Step 4: Simplify right side
    80,791.80x = 8,293,477,241.20
  5. Step 5: Solve for x
    x = 8,293,477,241.20/80,791.80
  6. Step 6: Final answer
    x = 102,652.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.