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Finding the Fourth Proportional to 67,216.65, 100,824.97 and 20,469.93

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Solution

The fourth proportional to 67,216.65, 100,824.97 and 20,469.93 is: 30,704.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,216.65 : 100,824.97 = 20,469.93 : x
  2. Step 2: Convert to fraction form
    67,216.65/100,824.97 = 20,469.93/x
  3. Step 3: Cross multiply
    67,216.65x = 100,824.97 × 20,469.93
  4. Step 4: Simplify right side
    67,216.65x = 2,063,880,078.15
  5. Step 5: Solve for x
    x = 2,063,880,078.15/67,216.65
  6. Step 6: Final answer
    x = 30,704.89

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1.5x scale

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.