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Finding the Fourth Proportional to 74,531.20, 111,505.20 and 48,287.20

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Solution

The fourth proportional to 74,531.20, 111,505.20 and 48,287.20 is: 72,241.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,531.20 : 111,505.20 = 48,287.20 : x
  2. Step 2: Convert to fraction form
    74,531.20/111,505.20 = 48,287.20/x
  3. Step 3: Cross multiply
    74,531.20x = 111,505.20 × 48,287.20
  4. Step 4: Simplify right side
    74,531.20x = 5,384,273,893.44
  5. Step 5: Solve for x
    x = 5,384,273,893.44/74,531.20
  6. Step 6: Final answer
    x = 72,241.88

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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.