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Finding the Fourth Proportional to 281,479.79, 422,290.97 and 81,795.89

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Solution

The fourth proportional to 281,479.79, 422,290.97 and 81,795.89 is: 122,714.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,479.79 : 422,290.97 = 81,795.89 : x
  2. Step 2: Convert to fraction form
    281,479.79/422,290.97 = 81,795.89/x
  3. Step 3: Cross multiply
    281,479.79x = 422,290.97 × 81,795.89
  4. Step 4: Simplify right side
    281,479.79x = 34,541,663,209.68
  5. Step 5: Solve for x
    x = 34,541,663,209.68/281,479.79
  6. Step 6: Final answer
    x = 122,714.54

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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.