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Finding the Fourth Proportional to 69,578.80, 104,352.71 and 19,663.56

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Solution

The fourth proportional to 69,578.80, 104,352.71 and 19,663.56 is: 29,490.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,578.80 : 104,352.71 = 19,663.56 : x
  2. Step 2: Convert to fraction form
    69,578.80/104,352.71 = 19,663.56/x
  3. Step 3: Cross multiply
    69,578.80x = 104,352.71 × 19,663.56
  4. Step 4: Simplify right side
    69,578.80x = 2,051,945,675.93
  5. Step 5: Solve for x
    x = 2,051,945,675.93/69,578.80
  6. Step 6: Final answer
    x = 29,490.96

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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.