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Finding the Fourth Proportional to 281,207.81, 421,388.89 and 112,560.95

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Solution

The fourth proportional to 281,207.81, 421,388.89 and 112,560.95 is: 168,672.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,207.81 : 421,388.89 = 112,560.95 : x
  2. Step 2: Convert to fraction form
    281,207.81/421,388.89 = 112,560.95/x
  3. Step 3: Cross multiply
    281,207.81x = 421,388.89 × 112,560.95
  4. Step 4: Simplify right side
    281,207.81x = 47,431,933,777.85
  5. Step 5: Solve for x
    x = 47,431,933,777.85/281,207.81
  6. Step 6: Final answer
    x = 168,672.18

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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.