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Finding the Fourth Proportional to 279,021.30, 418,629.15 and 121,362.90

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Solution

The fourth proportional to 279,021.30, 418,629.15 and 121,362.90 is: 182,086.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,021.30 : 418,629.15 = 121,362.90 : x
  2. Step 2: Convert to fraction form
    279,021.30/418,629.15 = 121,362.90/x
  3. Step 3: Cross multiply
    279,021.30x = 418,629.15 × 121,362.90
  4. Step 4: Simplify right side
    279,021.30x = 50,806,047,668.54
  5. Step 5: Solve for x
    x = 50,806,047,668.54/279,021.30
  6. Step 6: Final answer
    x = 182,086.63

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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.