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Finding the Fourth Proportional to 281,181.91, 421,243.22 and 138,860.66

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Solution

The fourth proportional to 281,181.91, 421,243.22 and 138,860.66 is: 208,029.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,181.91 : 421,243.22 = 138,860.66 : x
  2. Step 2: Convert to fraction form
    281,181.91/421,243.22 = 138,860.66/x
  3. Step 3: Cross multiply
    281,181.91x = 421,243.22 × 138,860.66
  4. Step 4: Simplify right side
    281,181.91x = 58,494,111,549.73
  5. Step 5: Solve for x
    x = 58,494,111,549.73/281,181.91
  6. Step 6: Final answer
    x = 208,029.43

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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.