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Finding the Fourth Proportional to 69,198.72, 103,798.17 and 19,278.96

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Solution

The fourth proportional to 69,198.72, 103,798.17 and 19,278.96 is: 28,918.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,198.72 : 103,798.17 = 19,278.96 : x
  2. Step 2: Convert to fraction form
    69,198.72/103,798.17 = 19,278.96/x
  3. Step 3: Cross multiply
    69,198.72x = 103,798.17 × 19,278.96
  4. Step 4: Simplify right side
    69,198.72x = 2,001,120,767.50
  5. Step 5: Solve for x
    x = 2,001,120,767.50/69,198.72
  6. Step 6: Final answer
    x = 28,918.47

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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.