Home / 128,072.70-192,218.40-57,104.55

Finding the Fourth Proportional to 128,072.70, 192,218.40 and 57,104.55

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Solution

The fourth proportional to 128,072.70, 192,218.40 and 57,104.55 is: 85,705.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,072.70 : 192,218.40 = 57,104.55 : x
  2. Step 2: Convert to fraction form
    128,072.70/192,218.40 = 57,104.55/x
  3. Step 3: Cross multiply
    128,072.70x = 192,218.40 × 57,104.55
  4. Step 4: Simplify right side
    128,072.70x = 10,976,545,233.72
  5. Step 5: Solve for x
    x = 10,976,545,233.72/128,072.70
  6. Step 6: Final answer
    x = 85,705.58

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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.