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Finding the Fourth Proportional to 220,752.40, 331,128.60 and 80,515.60

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Solution

The fourth proportional to 220,752.40, 331,128.60 and 80,515.60 is: 120,773.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,752.40 : 331,128.60 = 80,515.60 : x
  2. Step 2: Convert to fraction form
    220,752.40/331,128.60 = 80,515.60/x
  3. Step 3: Cross multiply
    220,752.40x = 331,128.60 × 80,515.60
  4. Step 4: Simplify right side
    220,752.40x = 26,661,017,906.16
  5. Step 5: Solve for x
    x = 26,661,017,906.16/220,752.40
  6. Step 6: Final answer
    x = 120,773.40

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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.