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Finding the Fourth Proportional to 87,616.76, 120,911.01 and 49,891.01

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Solution

The fourth proportional to 87,616.76, 120,911.01 and 49,891.01 is: 68,849.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,616.76 : 120,911.01 = 49,891.01 : x
  2. Step 2: Convert to fraction form
    87,616.76/120,911.01 = 49,891.01/x
  3. Step 3: Cross multiply
    87,616.76x = 120,911.01 × 49,891.01
  4. Step 4: Simplify right side
    87,616.76x = 6,032,372,409.02
  5. Step 5: Solve for x
    x = 6,032,372,409.02/87,616.76
  6. Step 6: Final answer
    x = 68,849.53

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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.