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Finding the Fourth Proportional to 324,384.98, 486,540.54 and 87,709.21

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Solution

The fourth proportional to 324,384.98, 486,540.54 and 87,709.21 is: 131,553.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,384.98 : 486,540.54 = 87,709.21 : x
  2. Step 2: Convert to fraction form
    324,384.98/486,540.54 = 87,709.21/x
  3. Step 3: Cross multiply
    324,384.98x = 486,540.54 × 87,709.21
  4. Step 4: Simplify right side
    324,384.98x = 42,674,086,396.37
  5. Step 5: Solve for x
    x = 42,674,086,396.37/324,384.98
  6. Step 6: Final answer
    x = 131,553.83

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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.