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Finding the Fourth Proportional to 65,605.64, 90,519.66 and 36,919.69

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Solution

The fourth proportional to 65,605.64, 90,519.66 and 36,919.69 is: 50,940.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,605.64 : 90,519.66 = 36,919.69 : x
  2. Step 2: Convert to fraction form
    65,605.64/90,519.66 = 36,919.69/x
  3. Step 3: Cross multiply
    65,605.64x = 90,519.66 × 36,919.69
  4. Step 4: Simplify right side
    65,605.64x = 3,341,957,559.81
  5. Step 5: Solve for x
    x = 3,341,957,559.81/65,605.64
  6. Step 6: Final answer
    x = 50,940.10

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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.