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Finding the Fourth Proportional to 279,743.99, 419,615.55 and 129,902.36

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Solution

The fourth proportional to 279,743.99, 419,615.55 and 129,902.36 is: 194,853.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,743.99 : 419,615.55 = 129,902.36 : x
  2. Step 2: Convert to fraction form
    279,743.99/419,615.55 = 129,902.36/x
  3. Step 3: Cross multiply
    279,743.99x = 419,615.55 × 129,902.36
  4. Step 4: Simplify right side
    279,743.99x = 54,509,048,139.62
  5. Step 5: Solve for x
    x = 54,509,048,139.62/279,743.99
  6. Step 6: Final answer
    x = 194,853.33

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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.