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Finding the Fourth Proportional to 69,709.31, 104,563.75 and 19,789.44

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Solution

The fourth proportional to 69,709.31, 104,563.75 and 19,789.44 is: 29,684.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,709.31 : 104,563.75 = 19,789.44 : x
  2. Step 2: Convert to fraction form
    69,709.31/104,563.75 = 19,789.44/x
  3. Step 3: Cross multiply
    69,709.31x = 104,563.75 × 19,789.44
  4. Step 4: Simplify right side
    69,709.31x = 2,069,258,277.59
  5. Step 5: Solve for x
    x = 2,069,258,277.59/69,709.31
  6. Step 6: Final answer
    x = 29,684.10

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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.