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Finding the Fourth Proportional to 212,469.20, 318,742.20 and 107,022.80

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Solution

The fourth proportional to 212,469.20, 318,742.20 and 107,022.80 is: 160,553.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,469.20 : 318,742.20 = 107,022.80 : x
  2. Step 2: Convert to fraction form
    212,469.20/318,742.20 = 107,022.80/x
  3. Step 3: Cross multiply
    212,469.20x = 318,742.20 × 107,022.80
  4. Step 4: Simplify right side
    212,469.20x = 34,112,682,722.16
  5. Step 5: Solve for x
    x = 34,112,682,722.16/212,469.20
  6. Step 6: Final answer
    x = 160,553.54

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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.