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Finding the Fourth Proportional to 260,081.91, 389,418.44 and 135,160.47

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Solution

The fourth proportional to 260,081.91, 389,418.44 and 135,160.47 is: 202,374.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,081.91 : 389,418.44 = 135,160.47 : x
  2. Step 2: Convert to fraction form
    260,081.91/389,418.44 = 135,160.47/x
  3. Step 3: Cross multiply
    260,081.91x = 389,418.44 × 135,160.47
  4. Step 4: Simplify right side
    260,081.91x = 52,633,978,701.26
  5. Step 5: Solve for x
    x = 52,633,978,701.26/260,081.91
  6. Step 6: Final answer
    x = 202,374.62

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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.