Home / 123,198.21-170,013.60-66,609.54

Finding the Fourth Proportional to 123,198.21, 170,013.60 and 66,609.54

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Solution

The fourth proportional to 123,198.21, 170,013.60 and 66,609.54 is: 91,921.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,198.21 : 170,013.60 = 66,609.54 : x
  2. Step 2: Convert to fraction form
    123,198.21/170,013.60 = 66,609.54/x
  3. Step 3: Cross multiply
    123,198.21x = 170,013.60 × 66,609.54
  4. Step 4: Simplify right side
    123,198.21x = 11,324,527,689.74
  5. Step 5: Solve for x
    x = 11,324,527,689.74/123,198.21
  6. Step 6: Final answer
    x = 91,921.20

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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.