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Finding the Fourth Proportional to 79,874.87, 119,725.65 and 39,376.44

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Solution

The fourth proportional to 79,874.87, 119,725.65 and 39,376.44 is: 59,021.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,874.87 : 119,725.65 = 39,376.44 : x
  2. Step 2: Convert to fraction form
    79,874.87/119,725.65 = 39,376.44/x
  3. Step 3: Cross multiply
    79,874.87x = 119,725.65 × 39,376.44
  4. Step 4: Simplify right side
    79,874.87x = 4,714,369,873.69
  5. Step 5: Solve for x
    x = 4,714,369,873.69/79,874.87
  6. Step 6: Final answer
    x = 59,021.94

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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.