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Finding the Fourth Proportional to 324,142.38, 486,213.66 and 87,485.04

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Solution

The fourth proportional to 324,142.38, 486,213.66 and 87,485.04 is: 131,227.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,142.38 : 486,213.66 = 87,485.04 : x
  2. Step 2: Convert to fraction form
    324,142.38/486,213.66 = 87,485.04/x
  3. Step 3: Cross multiply
    324,142.38x = 486,213.66 × 87,485.04
  4. Step 4: Simplify right side
    324,142.38x = 42,536,421,493.65
  5. Step 5: Solve for x
    x = 42,536,421,493.65/324,142.38
  6. Step 6: Final answer
    x = 131,227.58

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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.