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Finding the Fourth Proportional to 85,993.72, 128,940.76 and 33,341.56

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Solution

The fourth proportional to 85,993.72, 128,940.76 and 33,341.56 is: 49,993.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,993.72 : 128,940.76 = 33,341.56 : x
  2. Step 2: Convert to fraction form
    85,993.72/128,940.76 = 33,341.56/x
  3. Step 3: Cross multiply
    85,993.72x = 128,940.76 × 33,341.56
  4. Step 4: Simplify right side
    85,993.72x = 4,299,086,085.99
  5. Step 5: Solve for x
    x = 4,299,086,085.99/85,993.72
  6. Step 6: Final answer
    x = 49,993.02

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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.