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Finding the Fourth Proportional to 80,734.60, 121,101.90 and 45,742.60

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Solution

The fourth proportional to 80,734.60, 121,101.90 and 45,742.60 is: 68,613.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,734.60 : 121,101.90 = 45,742.60 : x
  2. Step 2: Convert to fraction form
    80,734.60/121,101.90 = 45,742.60/x
  3. Step 3: Cross multiply
    80,734.60x = 121,101.90 × 45,742.60
  4. Step 4: Simplify right side
    80,734.60x = 5,539,515,770.94
  5. Step 5: Solve for x
    x = 5,539,515,770.94/80,734.60
  6. Step 6: Final answer
    x = 68,613.90

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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.