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Finding the Fourth Proportional to 281,648.80, 422,500.80 and 81,971.20

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Solution

The fourth proportional to 281,648.80, 422,500.80 and 81,971.20 is: 122,964.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,648.80 : 422,500.80 = 81,971.20 : x
  2. Step 2: Convert to fraction form
    281,648.80/422,500.80 = 81,971.20/x
  3. Step 3: Cross multiply
    281,648.80x = 422,500.80 × 81,971.20
  4. Step 4: Simplify right side
    281,648.80x = 34,632,897,576.96
  5. Step 5: Solve for x
    x = 34,632,897,576.96/281,648.80
  6. Step 6: Final answer
    x = 122,964.83

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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.