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Finding the Fourth Proportional to 87,620.73, 120,916.51 and 47,334.49

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Solution

The fourth proportional to 87,620.73, 120,916.51 and 47,334.49 is: 65,321.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,620.73 : 120,916.51 = 47,334.49 : x
  2. Step 2: Convert to fraction form
    87,620.73/120,916.51 = 47,334.49/x
  3. Step 3: Cross multiply
    87,620.73x = 120,916.51 × 47,334.49
  4. Step 4: Simplify right side
    87,620.73x = 5,723,521,333.43
  5. Step 5: Solve for x
    x = 5,723,521,333.43/87,620.73
  6. Step 6: Final answer
    x = 65,321.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.