Home / 81,183.53-121,729.73-55,912.75

Finding the Fourth Proportional to 81,183.53, 121,729.73 and 55,912.75

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Solution

The fourth proportional to 81,183.53, 121,729.73 and 55,912.75 is: 83,837.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,183.53 : 121,729.73 = 55,912.75 : x
  2. Step 2: Convert to fraction form
    81,183.53/121,729.73 = 55,912.75/x
  3. Step 3: Cross multiply
    81,183.53x = 121,729.73 × 55,912.75
  4. Step 4: Simplify right side
    81,183.53x = 6,806,243,796.52
  5. Step 5: Solve for x
    x = 6,806,243,796.52/81,183.53
  6. Step 6: Final answer
    x = 83,837.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.