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Finding the Fourth Proportional to 69,781.30, 104,673.16 and 19,862.68

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Solution

The fourth proportional to 69,781.30, 104,673.16 and 19,862.68 is: 29,794.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,781.30 : 104,673.16 = 19,862.68 : x
  2. Step 2: Convert to fraction form
    69,781.30/104,673.16 = 19,862.68/x
  3. Step 3: Cross multiply
    69,781.30x = 104,673.16 × 19,862.68
  4. Step 4: Simplify right side
    69,781.30x = 2,079,089,481.67
  5. Step 5: Solve for x
    x = 2,079,089,481.67/69,781.30
  6. Step 6: Final answer
    x = 29,794.36

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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.