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Finding the Fourth Proportional to 67,310.90, 100,971.15 and 20,563.70

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Solution

The fourth proportional to 67,310.90, 100,971.15 and 20,563.70 is: 30,847.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,310.90 : 100,971.15 = 20,563.70 : x
  2. Step 2: Convert to fraction form
    67,310.90/100,971.15 = 20,563.70/x
  3. Step 3: Cross multiply
    67,310.90x = 100,971.15 × 20,563.70
  4. Step 4: Simplify right side
    67,310.90x = 2,076,340,437.26
  5. Step 5: Solve for x
    x = 2,076,340,437.26/67,310.90
  6. Step 6: Final answer
    x = 30,847.02

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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.