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Finding the Fourth Proportional to 49,693.60, 74,514.80 and 18,512.80

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Solution

The fourth proportional to 49,693.60, 74,514.80 and 18,512.80 is: 27,759.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,693.60 : 74,514.80 = 18,512.80 : x
  2. Step 2: Convert to fraction form
    49,693.60/74,514.80 = 18,512.80/x
  3. Step 3: Cross multiply
    49,693.60x = 74,514.80 × 18,512.80
  4. Step 4: Simplify right side
    49,693.60x = 1,379,477,589.44
  5. Step 5: Solve for x
    x = 1,379,477,589.44/49,693.60
  6. Step 6: Final answer
    x = 27,759.66

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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.