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Finding the Fourth Proportional to 69,015.86, 103,481.97 and 45,018.09

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Solution

The fourth proportional to 69,015.86, 103,481.97 and 45,018.09 is: 67,499.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,015.86 : 103,481.97 = 45,018.09 : x
  2. Step 2: Convert to fraction form
    69,015.86/103,481.97 = 45,018.09/x
  3. Step 3: Cross multiply
    69,015.86x = 103,481.97 × 45,018.09
  4. Step 4: Simplify right side
    69,015.86x = 4,658,560,638.84
  5. Step 5: Solve for x
    x = 4,658,560,638.84/69,015.86
  6. Step 6: Final answer
    x = 67,499.86

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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.