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Finding the Fourth Proportional to 67,315.14, 100,969.05 and 20,568.02

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Solution

The fourth proportional to 67,315.14, 100,969.05 and 20,568.02 is: 30,850.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,315.14 : 100,969.05 = 20,568.02 : x
  2. Step 2: Convert to fraction form
    67,315.14/100,969.05 = 20,568.02/x
  3. Step 3: Cross multiply
    67,315.14x = 100,969.05 × 20,568.02
  4. Step 4: Simplify right side
    67,315.14x = 2,076,732,934.94
  5. Step 5: Solve for x
    x = 2,076,732,934.94/67,315.14
  6. Step 6: Final answer
    x = 30,850.90

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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.