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Finding the Fourth Proportional to 179,287.20, 268,930.80 and 74,311.20

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Solution

The fourth proportional to 179,287.20, 268,930.80 and 74,311.20 is: 111,466.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    179,287.20 : 268,930.80 = 74,311.20 : x
  2. Step 2: Convert to fraction form
    179,287.20/268,930.80 = 74,311.20/x
  3. Step 3: Cross multiply
    179,287.20x = 268,930.80 × 74,311.20
  4. Step 4: Simplify right side
    179,287.20x = 19,984,570,464.96
  5. Step 5: Solve for x
    x = 19,984,570,464.96/179,287.20
  6. Step 6: Final answer
    x = 111,466.80

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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.