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Finding the Fourth Proportional to 86,590.77, 129,771.33 and 44,469.15

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Solution

The fourth proportional to 86,590.77, 129,771.33 and 44,469.15 is: 66,644.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,590.77 : 129,771.33 = 44,469.15 : x
  2. Step 2: Convert to fraction form
    86,590.77/129,771.33 = 44,469.15/x
  3. Step 3: Cross multiply
    86,590.77x = 129,771.33 × 44,469.15
  4. Step 4: Simplify right side
    86,590.77x = 5,770,820,739.47
  5. Step 5: Solve for x
    x = 5,770,820,739.47/86,590.77
  6. Step 6: Final answer
    x = 66,644.76

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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.