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Finding the Fourth Proportional to 67,304.68, 100,971.42 and 20,561

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Solution

The fourth proportional to 67,304.68, 100,971.42 and 20,561 is: 30,845.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,304.68 : 100,971.42 = 20,561 : x
  2. Step 2: Convert to fraction form
    67,304.68/100,971.42 = 20,561/x
  3. Step 3: Cross multiply
    67,304.68x = 100,971.42 × 20,561
  4. Step 4: Simplify right side
    67,304.68x = 2,076,073,366.62
  5. Step 5: Solve for x
    x = 2,076,073,366.62/67,304.68
  6. Step 6: Final answer
    x = 30,845.90

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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.