Home / 81,020.30-121,456.94-28,401.08

Finding the Fourth Proportional to 81,020.30, 121,456.94 and 28,401.08

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Solution

The fourth proportional to 81,020.30, 121,456.94 and 28,401.08 is: 42,575.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,020.30 : 121,456.94 = 28,401.08 : x
  2. Step 2: Convert to fraction form
    81,020.30/121,456.94 = 28,401.08/x
  3. Step 3: Cross multiply
    81,020.30x = 121,456.94 × 28,401.08
  4. Step 4: Simplify right side
    81,020.30x = 3,449,508,443.03
  5. Step 5: Solve for x
    x = 3,449,508,443.03/81,020.30
  6. Step 6: Final answer
    x = 42,575.85

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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.