Home / 80,896.57-121,399.52-28,306.51

Finding the Fourth Proportional to 80,896.57, 121,399.52 and 28,306.51

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Solution

The fourth proportional to 80,896.57, 121,399.52 and 28,306.51 is: 42,478.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,896.57 : 121,399.52 = 28,306.51 : x
  2. Step 2: Convert to fraction form
    80,896.57/121,399.52 = 28,306.51/x
  3. Step 3: Cross multiply
    80,896.57x = 121,399.52 × 28,306.51
  4. Step 4: Simplify right side
    80,896.57x = 3,436,396,726.88
  5. Step 5: Solve for x
    x = 3,436,396,726.88/80,896.57
  6. Step 6: Final answer
    x = 42,478.89

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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.