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Finding the Fourth Proportional to 259,893.72, 389,873.36 and 91,374.44

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Solution

The fourth proportional to 259,893.72, 389,873.36 and 91,374.44 is: 137,073.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,893.72 : 389,873.36 = 91,374.44 : x
  2. Step 2: Convert to fraction form
    259,893.72/389,873.36 = 91,374.44/x
  3. Step 3: Cross multiply
    259,893.72x = 389,873.36 × 91,374.44
  4. Step 4: Simplify right side
    259,893.72x = 35,624,459,940.92
  5. Step 5: Solve for x
    x = 35,624,459,940.92/259,893.72
  6. Step 6: Final answer
    x = 137,073.18

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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.