Home / 80,786.60-121,235.25-28,196.09

Finding the Fourth Proportional to 80,786.60, 121,235.25 and 28,196.09

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Solution

The fourth proportional to 80,786.60, 121,235.25 and 28,196.09 is: 42,313.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,786.60 : 121,235.25 = 28,196.09 : x
  2. Step 2: Convert to fraction form
    80,786.60/121,235.25 = 28,196.09/x
  3. Step 3: Cross multiply
    80,786.60x = 121,235.25 × 28,196.09
  4. Step 4: Simplify right side
    80,786.60x = 3,418,359,414.00
  5. Step 5: Solve for x
    x = 3,418,359,414.00/80,786.60
  6. Step 6: Final answer
    x = 42,313.45

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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.