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Finding the Fourth Proportional to 86,904.87, 119,866.75 and 79,757.81

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Solution

The fourth proportional to 86,904.87, 119,866.75 and 79,757.81 is: 110,008.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,904.87 : 119,866.75 = 79,757.81 : x
  2. Step 2: Convert to fraction form
    86,904.87/119,866.75 = 79,757.81/x
  3. Step 3: Cross multiply
    86,904.87x = 119,866.75 × 79,757.81
  4. Step 4: Simplify right side
    86,904.87x = 9,560,309,471.82
  5. Step 5: Solve for x
    x = 9,560,309,471.82/86,904.87
  6. Step 6: Final answer
    x = 110,008.91

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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.