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Finding the Fourth Proportional to 323,917.99, 485,906.14 and 87,255.43

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Solution

The fourth proportional to 323,917.99, 485,906.14 and 87,255.43 is: 130,891.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,917.99 : 485,906.14 = 87,255.43 : x
  2. Step 2: Convert to fraction form
    323,917.99/485,906.14 = 87,255.43/x
  3. Step 3: Cross multiply
    323,917.99x = 485,906.14 × 87,255.43
  4. Step 4: Simplify right side
    323,917.99x = 42,397,949,185.34
  5. Step 5: Solve for x
    x = 42,397,949,185.34/323,917.99
  6. Step 6: Final answer
    x = 130,891.00

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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.