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Finding the Fourth Proportional to 87,669, 120,983.22 and 49,943.25

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Solution

The fourth proportional to 87,669, 120,983.22 and 49,943.25 is: 68,921.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,669 : 120,983.22 = 49,943.25 : x
  2. Step 2: Convert to fraction form
    87,669/120,983.22 = 49,943.25/x
  3. Step 3: Cross multiply
    87,669x = 120,983.22 × 49,943.25
  4. Step 4: Simplify right side
    87,669x = 6,042,295,202.27
  5. Step 5: Solve for x
    x = 6,042,295,202.27/87,669
  6. Step 6: Final answer
    x = 68,921.69

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1.5x scale

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.