Home / 128,135.71-192,221.94-39,396.66

Finding the Fourth Proportional to 128,135.71, 192,221.94 and 39,396.66

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Solution

The fourth proportional to 128,135.71, 192,221.94 and 39,396.66 is: 59,100.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,135.71 : 192,221.94 = 39,396.66 : x
  2. Step 2: Convert to fraction form
    128,135.71/192,221.94 = 39,396.66/x
  3. Step 3: Cross multiply
    128,135.71x = 192,221.94 × 39,396.66
  4. Step 4: Simplify right side
    128,135.71x = 7,572,902,414.72
  5. Step 5: Solve for x
    x = 7,572,902,414.72/128,135.71
  6. Step 6: Final answer
    x = 59,100.64

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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.