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Finding the Fourth Proportional to 272,311.20, 408,466.80 and 82,771.20

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Solution

The fourth proportional to 272,311.20, 408,466.80 and 82,771.20 is: 124,156.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,311.20 : 408,466.80 = 82,771.20 : x
  2. Step 2: Convert to fraction form
    272,311.20/408,466.80 = 82,771.20/x
  3. Step 3: Cross multiply
    272,311.20x = 408,466.80 × 82,771.20
  4. Step 4: Simplify right side
    272,311.20x = 33,809,287,196.16
  5. Step 5: Solve for x
    x = 33,809,287,196.16/272,311.20
  6. Step 6: Final answer
    x = 124,156.80

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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.