Home / 81,986.40-113,183.88-55,269.36

Finding the Fourth Proportional to 81,986.40, 113,183.88 and 55,269.36

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Solution

The fourth proportional to 81,986.40, 113,183.88 and 55,269.36 is: 76,300.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,986.40 : 113,183.88 = 55,269.36 : x
  2. Step 2: Convert to fraction form
    81,986.40/113,183.88 = 55,269.36/x
  3. Step 3: Cross multiply
    81,986.40x = 113,183.88 × 55,269.36
  4. Step 4: Simplify right side
    81,986.40x = 6,255,600,609.92
  5. Step 5: Solve for x
    x = 6,255,600,609.92/81,986.40
  6. Step 6: Final answer
    x = 76,300.47

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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.