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Finding the Fourth Proportional to 128,199.33, 192,371.90 and 69,033.69

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Solution

The fourth proportional to 128,199.33, 192,371.90 and 69,033.69 is: 103,589.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,199.33 : 192,371.90 = 69,033.69 : x
  2. Step 2: Convert to fraction form
    128,199.33/192,371.90 = 69,033.69/x
  3. Step 3: Cross multiply
    128,199.33x = 192,371.90 × 69,033.69
  4. Step 4: Simplify right side
    128,199.33x = 13,280,141,764.14
  5. Step 5: Solve for x
    x = 13,280,141,764.14/128,199.33
  6. Step 6: Final answer
    x = 103,589.79

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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.