Home / 128,401.40-192,647.57-57,317.42

Finding the Fourth Proportional to 128,401.40, 192,647.57 and 57,317.42

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Solution

The fourth proportional to 128,401.40, 192,647.57 and 57,317.42 is: 85,996.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,401.40 : 192,647.57 = 57,317.42 : x
  2. Step 2: Convert to fraction form
    128,401.40/192,647.57 = 57,317.42/x
  3. Step 3: Cross multiply
    128,401.40x = 192,647.57 × 57,317.42
  4. Step 4: Simplify right side
    128,401.40x = 11,042,061,876.70
  5. Step 5: Solve for x
    x = 11,042,061,876.70/128,401.40
  6. Step 6: Final answer
    x = 85,996.43

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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.