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Finding the Fourth Proportional to 279,136.46, 418,641.80 and 79,452.42

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Solution

The fourth proportional to 279,136.46, 418,641.80 and 79,452.42 is: 119,160.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,136.46 : 418,641.80 = 79,452.42 : x
  2. Step 2: Convert to fraction form
    279,136.46/418,641.80 = 79,452.42/x
  3. Step 3: Cross multiply
    279,136.46x = 418,641.80 × 79,452.42
  4. Step 4: Simplify right side
    279,136.46x = 33,262,103,725.89
  5. Step 5: Solve for x
    x = 33,262,103,725.89/279,136.46
  6. Step 6: Final answer
    x = 119,160.73

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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.