Home / 80,409.24-111,015.09-51,778.71

Finding the Fourth Proportional to 80,409.24, 111,015.09 and 51,778.71

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Solution

The fourth proportional to 80,409.24, 111,015.09 and 51,778.71 is: 71,487.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,409.24 : 111,015.09 = 51,778.71 : x
  2. Step 2: Convert to fraction form
    80,409.24/111,015.09 = 51,778.71/x
  3. Step 3: Cross multiply
    80,409.24x = 111,015.09 × 51,778.71
  4. Step 4: Simplify right side
    80,409.24x = 5,748,218,150.73
  5. Step 5: Solve for x
    x = 5,748,218,150.73/80,409.24
  6. Step 6: Final answer
    x = 71,487.03

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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.