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Finding the Fourth Proportional to 67,255.80, 100,880.04 and 20,505

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Solution

The fourth proportional to 67,255.80, 100,880.04 and 20,505 is: 30,756.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,255.80 : 100,880.04 = 20,505 : x
  2. Step 2: Convert to fraction form
    67,255.80/100,880.04 = 20,505/x
  3. Step 3: Cross multiply
    67,255.80x = 100,880.04 × 20,505
  4. Step 4: Simplify right side
    67,255.80x = 2,068,545,220.20
  5. Step 5: Solve for x
    x = 2,068,545,220.20/67,255.80
  6. Step 6: Final answer
    x = 30,756.38

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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.