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Finding the Fourth Proportional to 279,171.09, 418,758.93 and 79,491.24

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Solution

The fourth proportional to 279,171.09, 418,758.93 and 79,491.24 is: 119,237.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,171.09 : 418,758.93 = 79,491.24 : x
  2. Step 2: Convert to fraction form
    279,171.09/418,758.93 = 79,491.24/x
  3. Step 3: Cross multiply
    279,171.09x = 418,758.93 × 79,491.24
  4. Step 4: Simplify right side
    279,171.09x = 33,287,666,606.77
  5. Step 5: Solve for x
    x = 33,287,666,606.77/279,171.09
  6. Step 6: Final answer
    x = 119,237.51

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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.