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Finding the Fourth Proportional to 279,034.10, 418,541.81 and 121,262.56

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Solution

The fourth proportional to 279,034.10, 418,541.81 and 121,262.56 is: 181,889.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,034.10 : 418,541.81 = 121,262.56 : x
  2. Step 2: Convert to fraction form
    279,034.10/418,541.81 = 121,262.56/x
  3. Step 3: Cross multiply
    279,034.10x = 418,541.81 × 121,262.56
  4. Step 4: Simplify right side
    279,034.10x = 50,753,451,347.63
  5. Step 5: Solve for x
    x = 50,753,451,347.63/279,034.10
  6. Step 6: Final answer
    x = 181,889.78

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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.