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Finding the Fourth Proportional to 65,805.56, 90,811.40 and 35,590.92

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Solution

The fourth proportional to 65,805.56, 90,811.40 and 35,590.92 is: 49,115.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,805.56 : 90,811.40 = 35,590.92 : x
  2. Step 2: Convert to fraction form
    65,805.56/90,811.40 = 35,590.92/x
  3. Step 3: Cross multiply
    65,805.56x = 90,811.40 × 35,590.92
  4. Step 4: Simplify right side
    65,805.56x = 3,232,061,272.49
  5. Step 5: Solve for x
    x = 3,232,061,272.49/65,805.56
  6. Step 6: Final answer
    x = 49,115.32

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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.