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Finding the Fourth Proportional to 220,827.60, 331,241.40 and 80,640.90

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Solution

The fourth proportional to 220,827.60, 331,241.40 and 80,640.90 is: 120,961.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,827.60 : 331,241.40 = 80,640.90 : x
  2. Step 2: Convert to fraction form
    220,827.60/331,241.40 = 80,640.90/x
  3. Step 3: Cross multiply
    220,827.60x = 331,241.40 × 80,640.90
  4. Step 4: Simplify right side
    220,827.60x = 26,711,604,613.26
  5. Step 5: Solve for x
    x = 26,711,604,613.26/220,827.60
  6. Step 6: Final answer
    x = 120,961.35

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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.