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Finding the Fourth Proportional to 81,105.66, 111,919.50 and 45,292.32

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Solution

The fourth proportional to 81,105.66, 111,919.50 and 45,292.32 is: 62,499.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,105.66 : 111,919.50 = 45,292.32 : x
  2. Step 2: Convert to fraction form
    81,105.66/111,919.50 = 45,292.32/x
  3. Step 3: Cross multiply
    81,105.66x = 111,919.50 × 45,292.32
  4. Step 4: Simplify right side
    81,105.66x = 5,069,093,808.24
  5. Step 5: Solve for x
    x = 5,069,093,808.24/81,105.66
  6. Step 6: Final answer
    x = 62,499.88

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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.