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Finding the Fourth Proportional to 281,991.68, 423,012.45 and 79,589.59

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Solution

The fourth proportional to 281,991.68, 423,012.45 and 79,589.59 is: 119,391.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,991.68 : 423,012.45 = 79,589.59 : x
  2. Step 2: Convert to fraction form
    281,991.68/423,012.45 = 79,589.59/x
  3. Step 3: Cross multiply
    281,991.68x = 423,012.45 × 79,589.59
  4. Step 4: Simplify right side
    281,991.68x = 33,667,387,460.40
  5. Step 5: Solve for x
    x = 33,667,387,460.40/281,991.68
  6. Step 6: Final answer
    x = 119,391.42

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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.