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Finding the Fourth Proportional to 140,800.40, 211,200.60 and 131,469.20

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Solution

The fourth proportional to 140,800.40, 211,200.60 and 131,469.20 is: 197,203.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,800.40 : 211,200.60 = 131,469.20 : x
  2. Step 2: Convert to fraction form
    140,800.40/211,200.60 = 131,469.20/x
  3. Step 3: Cross multiply
    140,800.40x = 211,200.60 × 131,469.20
  4. Step 4: Simplify right side
    140,800.40x = 27,766,373,921.52
  5. Step 5: Solve for x
    x = 27,766,373,921.52/140,800.40
  6. Step 6: Final answer
    x = 197,203.80

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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.