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Finding the Fourth Proportional to 69,817.78, 104,710.90 and 19,896.81

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Solution

The fourth proportional to 69,817.78, 104,710.90 and 19,896.81 is: 29,840.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,817.78 : 104,710.90 = 19,896.81 : x
  2. Step 2: Convert to fraction form
    69,817.78/104,710.90 = 19,896.81/x
  3. Step 3: Cross multiply
    69,817.78x = 104,710.90 × 19,896.81
  4. Step 4: Simplify right side
    69,817.78x = 2,083,412,882.23
  5. Step 5: Solve for x
    x = 2,083,412,882.23/69,817.78
  6. Step 6: Final answer
    x = 29,840.72

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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.