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Finding the Fourth Proportional to 87,679.97, 120,998.28 and 47,393.73

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Solution

The fourth proportional to 87,679.97, 120,998.28 and 47,393.73 is: 65,403.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,679.97 : 120,998.28 = 47,393.73 : x
  2. Step 2: Convert to fraction form
    87,679.97/120,998.28 = 47,393.73/x
  3. Step 3: Cross multiply
    87,679.97x = 120,998.28 × 47,393.73
  4. Step 4: Simplify right side
    87,679.97x = 5,734,559,812.78
  5. Step 5: Solve for x
    x = 5,734,559,812.78/87,679.97
  6. Step 6: Final answer
    x = 65,403.30

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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.