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Finding the Fourth Proportional to 87,847.76, 121,229.74 and 47,561.51

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Solution

The fourth proportional to 87,847.76, 121,229.74 and 47,561.51 is: 65,634.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,847.76 : 121,229.74 = 47,561.51 : x
  2. Step 2: Convert to fraction form
    87,847.76/121,229.74 = 47,561.51/x
  3. Step 3: Cross multiply
    87,847.76x = 121,229.74 × 47,561.51
  4. Step 4: Simplify right side
    87,847.76x = 5,765,869,675.48
  5. Step 5: Solve for x
    x = 5,765,869,675.48/87,847.76
  6. Step 6: Final answer
    x = 65,634.79

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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.