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Finding the Fourth Proportional to 69,781.98, 104,665.26 and 19,184.96

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Solution

The fourth proportional to 69,781.98, 104,665.26 and 19,184.96 is: 28,775.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,781.98 : 104,665.26 = 19,184.96 : x
  2. Step 2: Convert to fraction form
    69,781.98/104,665.26 = 19,184.96/x
  3. Step 3: Cross multiply
    69,781.98x = 104,665.26 × 19,184.96
  4. Step 4: Simplify right side
    69,781.98x = 2,007,998,826.49
  5. Step 5: Solve for x
    x = 2,007,998,826.49/69,781.98
  6. Step 6: Final answer
    x = 28,775.32

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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.