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Finding the Fourth Proportional to 67,239.99, 100,874.57 and 20,496.51

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Solution

The fourth proportional to 67,239.99, 100,874.57 and 20,496.51 is: 30,749.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,239.99 : 100,874.57 = 20,496.51 : x
  2. Step 2: Convert to fraction form
    67,239.99/100,874.57 = 20,496.51/x
  3. Step 3: Cross multiply
    67,239.99x = 100,874.57 × 20,496.51
  4. Step 4: Simplify right side
    67,239.99x = 2,067,576,530.27
  5. Step 5: Solve for x
    x = 2,067,576,530.27/67,239.99
  6. Step 6: Final answer
    x = 30,749.21

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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.