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Finding the Fourth Proportional to 81,581.91, 122,372.87 and 28,993.47

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Solution

The fourth proportional to 81,581.91, 122,372.87 and 28,993.47 is: 43,490.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,581.91 : 122,372.87 = 28,993.47 : x
  2. Step 2: Convert to fraction form
    81,581.91/122,372.87 = 28,993.47/x
  3. Step 3: Cross multiply
    81,581.91x = 122,372.87 × 28,993.47
  4. Step 4: Simplify right side
    81,581.91x = 3,548,013,531.29
  5. Step 5: Solve for x
    x = 3,548,013,531.29/81,581.91
  6. Step 6: Final answer
    x = 43,490.20

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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.