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Finding the Fourth Proportional to 55,481.70, 83,230.68 and 20,418.42

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Solution

The fourth proportional to 55,481.70, 83,230.68 and 20,418.42 is: 30,630.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,481.70 : 83,230.68 = 20,418.42 : x
  2. Step 2: Convert to fraction form
    55,481.70/83,230.68 = 20,418.42/x
  3. Step 3: Cross multiply
    55,481.70x = 83,230.68 × 20,418.42
  4. Step 4: Simplify right side
    55,481.70x = 1,699,438,981.13
  5. Step 5: Solve for x
    x = 1,699,438,981.13/55,481.70
  6. Step 6: Final answer
    x = 30,630.62

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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.