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Finding the Fourth Proportional to 279,431.57, 418,912.23 and 121,541.10

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Solution

The fourth proportional to 279,431.57, 418,912.23 and 121,541.10 is: 182,209.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,431.57 : 418,912.23 = 121,541.10 : x
  2. Step 2: Convert to fraction form
    279,431.57/418,912.23 = 121,541.10/x
  3. Step 3: Cross multiply
    279,431.57x = 418,912.23 × 121,541.10
  4. Step 4: Simplify right side
    279,431.57x = 50,915,053,237.65
  5. Step 5: Solve for x
    x = 50,915,053,237.65/279,431.57
  6. Step 6: Final answer
    x = 182,209.38

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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.