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Finding the Fourth Proportional to 123,198.60, 170,014.31 and 66,609.98

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Solution

The fourth proportional to 123,198.60, 170,014.31 and 66,609.98 is: 91,921.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,198.60 : 170,014.31 = 66,609.98 : x
  2. Step 2: Convert to fraction form
    123,198.60/170,014.31 = 66,609.98/x
  3. Step 3: Cross multiply
    123,198.60x = 170,014.31 × 66,609.98
  4. Step 4: Simplify right side
    123,198.60x = 11,324,649,788.81
  5. Step 5: Solve for x
    x = 11,324,649,788.81/123,198.60
  6. Step 6: Final answer
    x = 91,921.90

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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.