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Finding the Fourth Proportional to 279,606.12, 419,338.80 and 79,927.56

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Solution

The fourth proportional to 279,606.12, 419,338.80 and 79,927.56 is: 119,871.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,606.12 : 419,338.80 = 79,927.56 : x
  2. Step 2: Convert to fraction form
    279,606.12/419,338.80 = 79,927.56/x
  3. Step 3: Cross multiply
    279,606.12x = 419,338.80 × 79,927.56
  4. Step 4: Simplify right side
    279,606.12x = 33,516,727,097.33
  5. Step 5: Solve for x
    x = 33,516,727,097.33/279,606.12
  6. Step 6: Final answer
    x = 119,871.22

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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.