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Finding the Fourth Proportional to 53,003.73, 79,474.45 and 21,414.80

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Solution

The fourth proportional to 53,003.73, 79,474.45 and 21,414.80 is: 32,109.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,003.73 : 79,474.45 = 21,414.80 : x
  2. Step 2: Convert to fraction form
    53,003.73/79,474.45 = 21,414.80/x
  3. Step 3: Cross multiply
    53,003.73x = 79,474.45 × 21,414.80
  4. Step 4: Simplify right side
    53,003.73x = 1,701,929,190.12
  5. Step 5: Solve for x
    x = 1,701,929,190.12/53,003.73
  6. Step 6: Final answer
    x = 32,109.61

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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.