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Finding the Fourth Proportional to 67,168.90, 100,735.35 and 20,409.22

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Solution

The fourth proportional to 67,168.90, 100,735.35 and 20,409.22 is: 30,608.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,168.90 : 100,735.35 = 20,409.22 : x
  2. Step 2: Convert to fraction form
    67,168.90/100,735.35 = 20,409.22/x
  3. Step 3: Cross multiply
    67,168.90x = 100,735.35 × 20,409.22
  4. Step 4: Simplify right side
    67,168.90x = 2,055,929,919.93
  5. Step 5: Solve for x
    x = 2,055,929,919.93/67,168.90
  6. Step 6: Final answer
    x = 30,608.36

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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.