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Finding the Fourth Proportional to 323,781.41, 485,634.74 and 87,105.48

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Solution

The fourth proportional to 323,781.41, 485,634.74 and 87,105.48 is: 130,648.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,781.41 : 485,634.74 = 87,105.48 : x
  2. Step 2: Convert to fraction form
    323,781.41/485,634.74 = 87,105.48/x
  3. Step 3: Cross multiply
    323,781.41x = 485,634.74 × 87,105.48
  4. Step 4: Simplify right side
    323,781.41x = 42,301,446,696.85
  5. Step 5: Solve for x
    x = 42,301,446,696.85/323,781.41
  6. Step 6: Final answer
    x = 130,648.17

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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.