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Finding the Fourth Proportional to 65,765.54, 90,765.34 and 37,091.09

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Solution

The fourth proportional to 65,765.54, 90,765.34 and 37,091.09 is: 51,190.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,765.54 : 90,765.34 = 37,091.09 : x
  2. Step 2: Convert to fraction form
    65,765.54/90,765.34 = 37,091.09/x
  3. Step 3: Cross multiply
    65,765.54x = 90,765.34 × 37,091.09
  4. Step 4: Simplify right side
    65,765.54x = 3,366,585,529.01
  5. Step 5: Solve for x
    x = 3,366,585,529.01/65,765.54
  6. Step 6: Final answer
    x = 51,190.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.