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Finding the Fourth Proportional to 69,699.70, 104,553.56 and 19,775.89

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Solution

The fourth proportional to 69,699.70, 104,553.56 and 19,775.89 is: 29,664.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,699.70 : 104,553.56 = 19,775.89 : x
  2. Step 2: Convert to fraction form
    69,699.70/104,553.56 = 19,775.89/x
  3. Step 3: Cross multiply
    69,699.70x = 104,553.56 × 19,775.89
  4. Step 4: Simplify right side
    69,699.70x = 2,067,639,701.67
  5. Step 5: Solve for x
    x = 2,067,639,701.67/69,699.70
  6. Step 6: Final answer
    x = 29,664.97

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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.