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Finding the Fourth Proportional to 220,912.40, 331,368.60 and 121,379.60

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Solution

The fourth proportional to 220,912.40, 331,368.60 and 121,379.60 is: 182,069.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,912.40 : 331,368.60 = 121,379.60 : x
  2. Step 2: Convert to fraction form
    220,912.40/331,368.60 = 121,379.60/x
  3. Step 3: Cross multiply
    220,912.40x = 331,368.60 × 121,379.60
  4. Step 4: Simplify right side
    220,912.40x = 40,221,388,120.56
  5. Step 5: Solve for x
    x = 40,221,388,120.56/220,912.40
  6. Step 6: Final answer
    x = 182,069.40

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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.