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Finding the Fourth Proportional to 259,416.78, 389,136.86 and 79,489.25

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Solution

The fourth proportional to 259,416.78, 389,136.86 and 79,489.25 is: 119,237.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,416.78 : 389,136.86 = 79,489.25 : x
  2. Step 2: Convert to fraction form
    259,416.78/389,136.86 = 79,489.25/x
  3. Step 3: Cross multiply
    259,416.78x = 389,136.86 × 79,489.25
  4. Step 4: Simplify right side
    259,416.78x = 30,932,196,562.97
  5. Step 5: Solve for x
    x = 30,932,196,562.97/259,416.78
  6. Step 6: Final answer
    x = 119,237.46

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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.