Home / 81,540.99-122,282.17-28,218.49

Finding the Fourth Proportional to 81,540.99, 122,282.17 and 28,218.49

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Solution

The fourth proportional to 81,540.99, 122,282.17 and 28,218.49 is: 42,317.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,540.99 : 122,282.17 = 28,218.49 : x
  2. Step 2: Convert to fraction form
    81,540.99/122,282.17 = 28,218.49/x
  3. Step 3: Cross multiply
    81,540.99x = 122,282.17 × 28,218.49
  4. Step 4: Simplify right side
    81,540.99x = 3,450,617,920.89
  5. Step 5: Solve for x
    x = 3,450,617,920.89/81,540.99
  6. Step 6: Final answer
    x = 42,317.59

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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.