Home / 83,620.92-115,357.86-51,778.20

Finding the Fourth Proportional to 83,620.92, 115,357.86 and 51,778.20

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Solution

The fourth proportional to 83,620.92, 115,357.86 and 51,778.20 is: 71,429.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,620.92 : 115,357.86 = 51,778.20 : x
  2. Step 2: Convert to fraction form
    83,620.92/115,357.86 = 51,778.20/x
  3. Step 3: Cross multiply
    83,620.92x = 115,357.86 × 51,778.20
  4. Step 4: Simplify right side
    83,620.92x = 5,973,022,346.65
  5. Step 5: Solve for x
    x = 5,973,022,346.65/83,620.92
  6. Step 6: Final answer
    x = 71,429.76

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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.