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Finding the Fourth Proportional to 324,578.53, 486,830.13 and 87,939.06

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Solution

The fourth proportional to 324,578.53, 486,830.13 and 87,939.06 is: 131,898.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,578.53 : 486,830.13 = 87,939.06 : x
  2. Step 2: Convert to fraction form
    324,578.53/486,830.13 = 87,939.06/x
  3. Step 3: Cross multiply
    324,578.53x = 486,830.13 × 87,939.06
  4. Step 4: Simplify right side
    324,578.53x = 42,811,384,011.88
  5. Step 5: Solve for x
    x = 42,811,384,011.88/324,578.53
  6. Step 6: Final answer
    x = 131,898.39

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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.