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Finding the Fourth Proportional to 69,783.74, 104,659.89 and 19,862.73

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Solution

The fourth proportional to 69,783.74, 104,659.89 and 19,862.73 is: 29,789.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,783.74 : 104,659.89 = 19,862.73 : x
  2. Step 2: Convert to fraction form
    69,783.74/104,659.89 = 19,862.73/x
  3. Step 3: Cross multiply
    69,783.74x = 104,659.89 × 19,862.73
  4. Step 4: Simplify right side
    69,783.74x = 2,078,831,062.41
  5. Step 5: Solve for x
    x = 2,078,831,062.41/69,783.74
  6. Step 6: Final answer
    x = 29,789.62

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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.