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Finding the Fourth Proportional to 100,371.42, 150,584.67 and 81,604.80

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Solution

The fourth proportional to 100,371.42, 150,584.67 and 81,604.80 is: 122,429.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,371.42 : 150,584.67 = 81,604.80 : x
  2. Step 2: Convert to fraction form
    100,371.42/150,584.67 = 81,604.80/x
  3. Step 3: Cross multiply
    100,371.42x = 150,584.67 × 81,604.80
  4. Step 4: Simplify right side
    100,371.42x = 12,288,431,878.42
  5. Step 5: Solve for x
    x = 12,288,431,878.42/100,371.42
  6. Step 6: Final answer
    x = 122,429.59

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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.