Home / 122,183.12-168,715.44-91,915.88

Finding the Fourth Proportional to 122,183.12, 168,715.44 and 91,915.88

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Solution

The fourth proportional to 122,183.12, 168,715.44 and 91,915.88 is: 126,921.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,183.12 : 168,715.44 = 91,915.88 : x
  2. Step 2: Convert to fraction form
    122,183.12/168,715.44 = 91,915.88/x
  3. Step 3: Cross multiply
    122,183.12x = 168,715.44 × 91,915.88
  4. Step 4: Simplify right side
    122,183.12x = 15,507,628,137.19
  5. Step 5: Solve for x
    x = 15,507,628,137.19/122,183.12
  6. Step 6: Final answer
    x = 126,921.20

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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.