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Finding the Fourth Proportional to 87,579, 120,859.16 and 49,853.25

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Solution

The fourth proportional to 87,579, 120,859.16 and 49,853.25 is: 68,797.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,579 : 120,859.16 = 49,853.25 : x
  2. Step 2: Convert to fraction form
    87,579/120,859.16 = 49,853.25/x
  3. Step 3: Cross multiply
    87,579x = 120,859.16 × 49,853.25
  4. Step 4: Simplify right side
    87,579x = 6,025,221,669.00
  5. Step 5: Solve for x
    x = 6,025,221,669.00/87,579
  6. Step 6: Final answer
    x = 68,797.56

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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.