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Finding the Fourth Proportional to 281,487.96, 422,259.60 and 81,810

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Solution

The fourth proportional to 281,487.96, 422,259.60 and 81,810 is: 122,723.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,487.96 : 422,259.60 = 81,810 : x
  2. Step 2: Convert to fraction form
    281,487.96/422,259.60 = 81,810/x
  3. Step 3: Cross multiply
    281,487.96x = 422,259.60 × 81,810
  4. Step 4: Simplify right side
    281,487.96x = 34,545,057,876
  5. Step 5: Solve for x
    x = 34,545,057,876/281,487.96
  6. Step 6: Final answer
    x = 122,723.04

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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.