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Finding the Fourth Proportional to 69,816.78, 104,709.40 and 19,895.81

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Solution

The fourth proportional to 69,816.78, 104,709.40 and 19,895.81 is: 29,839.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,816.78 : 104,709.40 = 19,895.81 : x
  2. Step 2: Convert to fraction form
    69,816.78/104,709.40 = 19,895.81/x
  3. Step 3: Cross multiply
    69,816.78x = 104,709.40 × 19,895.81
  4. Step 4: Simplify right side
    69,816.78x = 2,083,277,754.33
  5. Step 5: Solve for x
    x = 2,083,277,754.33/69,816.78
  6. Step 6: Final answer
    x = 29,839.21

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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.