Home / 128,440.20-192,401.10-89,041.80

Finding the Fourth Proportional to 128,440.20, 192,401.10 and 89,041.80

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Solution

The fourth proportional to 128,440.20, 192,401.10 and 89,041.80 is: 133,383.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,440.20 : 192,401.10 = 89,041.80 : x
  2. Step 2: Convert to fraction form
    128,440.20/192,401.10 = 89,041.80/x
  3. Step 3: Cross multiply
    128,440.20x = 192,401.10 × 89,041.80
  4. Step 4: Simplify right side
    128,440.20x = 17,131,740,265.98
  5. Step 5: Solve for x
    x = 17,131,740,265.98/128,440.20
  6. Step 6: Final answer
    x = 133,383.01

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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.