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Finding the Fourth Proportional to 323,891.87, 485,782.72 and 87,181.79

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Solution

The fourth proportional to 323,891.87, 485,782.72 and 87,181.79 is: 130,757.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,891.87 : 485,782.72 = 87,181.79 : x
  2. Step 2: Convert to fraction form
    323,891.87/485,782.72 = 87,181.79/x
  3. Step 3: Cross multiply
    323,891.87x = 485,782.72 × 87,181.79
  4. Step 4: Simplify right side
    323,891.87x = 42,351,404,433.80
  5. Step 5: Solve for x
    x = 42,351,404,433.80/323,891.87
  6. Step 6: Final answer
    x = 130,757.85

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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.