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Finding the Fourth Proportional to 216,530, 324,847.08 and 68,786

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Solution

The fourth proportional to 216,530, 324,847.08 and 68,786 is: 103,195.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,530 : 324,847.08 = 68,786 : x
  2. Step 2: Convert to fraction form
    216,530/324,847.08 = 68,786/x
  3. Step 3: Cross multiply
    216,530x = 324,847.08 × 68,786
  4. Step 4: Simplify right side
    216,530x = 22,344,931,244.88
  5. Step 5: Solve for x
    x = 22,344,931,244.88/216,530
  6. Step 6: Final answer
    x = 103,195.54

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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.