Home / 128,328.57-192,423.56-90,961.83

Finding the Fourth Proportional to 128,328.57, 192,423.56 and 90,961.83

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Solution

The fourth proportional to 128,328.57, 192,423.56 and 90,961.83 is: 136,393.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,328.57 : 192,423.56 = 90,961.83 : x
  2. Step 2: Convert to fraction form
    128,328.57/192,423.56 = 90,961.83/x
  3. Step 3: Cross multiply
    128,328.57x = 192,423.56 × 90,961.83
  4. Step 4: Simplify right side
    128,328.57x = 17,503,198,697.91
  5. Step 5: Solve for x
    x = 17,503,198,697.91/128,328.57
  6. Step 6: Final answer
    x = 136,393.62

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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.