Home / 87,819.80-131,716.20-28,655.51

Finding the Fourth Proportional to 87,819.80, 131,716.20 and 28,655.51

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Solution

The fourth proportional to 87,819.80, 131,716.20 and 28,655.51 is: 42,978.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,819.80 : 131,716.20 = 28,655.51 : x
  2. Step 2: Convert to fraction form
    87,819.80/131,716.20 = 28,655.51/x
  3. Step 3: Cross multiply
    87,819.80x = 131,716.20 × 28,655.51
  4. Step 4: Simplify right side
    87,819.80x = 3,774,394,886.26
  5. Step 5: Solve for x
    x = 3,774,394,886.26/87,819.80
  6. Step 6: Final answer
    x = 42,978.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.