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Finding the Fourth Proportional to 87,717, 121,049.46 and 47,973

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Solution

The fourth proportional to 87,717, 121,049.46 and 47,973 is: 66,202.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,717 : 121,049.46 = 47,973 : x
  2. Step 2: Convert to fraction form
    87,717/121,049.46 = 47,973/x
  3. Step 3: Cross multiply
    87,717x = 121,049.46 × 47,973
  4. Step 4: Simplify right side
    87,717x = 5,807,105,744.58
  5. Step 5: Solve for x
    x = 5,807,105,744.58/87,717
  6. Step 6: Final answer
    x = 66,202.74

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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.