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Finding the Fourth Proportional to 67,491.72, 101,239.20 and 20,745

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Solution

The fourth proportional to 67,491.72, 101,239.20 and 20,745 is: 31,118.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,491.72 : 101,239.20 = 20,745 : x
  2. Step 2: Convert to fraction form
    67,491.72/101,239.20 = 20,745/x
  3. Step 3: Cross multiply
    67,491.72x = 101,239.20 × 20,745
  4. Step 4: Simplify right side
    67,491.72x = 2,100,207,204
  5. Step 5: Solve for x
    x = 2,100,207,204/67,491.72
  6. Step 6: Final answer
    x = 31,118.00

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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.