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Finding the Fourth Proportional to 128,354.05, 192,556.74 and 39,604.22

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Solution

The fourth proportional to 128,354.05, 192,556.74 and 39,604.22 is: 59,414.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,354.05 : 192,556.74 = 39,604.22 : x
  2. Step 2: Convert to fraction form
    128,354.05/192,556.74 = 39,604.22/x
  3. Step 3: Cross multiply
    128,354.05x = 192,556.74 × 39,604.22
  4. Step 4: Simplify right side
    128,354.05x = 7,626,059,401.26
  5. Step 5: Solve for x
    x = 7,626,059,401.26/128,354.05
  6. Step 6: Final answer
    x = 59,414.25

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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.