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Finding the Fourth Proportional to 323,891.24, 485,781.78 and 87,181.16

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Solution

The fourth proportional to 323,891.24, 485,781.78 and 87,181.16 is: 130,756.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,891.24 : 485,781.78 = 87,181.16 : x
  2. Step 2: Convert to fraction form
    323,891.24/485,781.78 = 87,181.16/x
  3. Step 3: Cross multiply
    323,891.24x = 485,781.78 × 87,181.16
  4. Step 4: Simplify right side
    323,891.24x = 42,351,019,087.26
  5. Step 5: Solve for x
    x = 42,351,019,087.26/323,891.24
  6. Step 6: Final answer
    x = 130,756.91

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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.