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Finding the Fourth Proportional to 67,310.40, 100,970.40 and 20,563.20

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Solution

The fourth proportional to 67,310.40, 100,970.40 and 20,563.20 is: 30,846.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,310.40 : 100,970.40 = 20,563.20 : x
  2. Step 2: Convert to fraction form
    67,310.40/100,970.40 = 20,563.20/x
  3. Step 3: Cross multiply
    67,310.40x = 100,970.40 × 20,563.20
  4. Step 4: Simplify right side
    67,310.40x = 2,076,274,529.28
  5. Step 5: Solve for x
    x = 2,076,274,529.28/67,310.40
  6. Step 6: Final answer
    x = 30,846.27

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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.