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Finding the Fourth Proportional to 61,718.40, 85,183.20 and 36,230.40

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Solution

The fourth proportional to 61,718.40, 85,183.20 and 36,230.40 is: 50,004.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,718.40 : 85,183.20 = 36,230.40 : x
  2. Step 2: Convert to fraction form
    61,718.40/85,183.20 = 36,230.40/x
  3. Step 3: Cross multiply
    61,718.40x = 85,183.20 × 36,230.40
  4. Step 4: Simplify right side
    61,718.40x = 3,086,221,409.28
  5. Step 5: Solve for x
    x = 3,086,221,409.28/61,718.40
  6. Step 6: Final answer
    x = 50,004.88

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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.