Home / 220,911.40-331,367.10-121,378.60

Finding the Fourth Proportional to 220,911.40, 331,367.10 and 121,378.60

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Solution

The fourth proportional to 220,911.40, 331,367.10 and 121,378.60 is: 182,067.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,911.40 : 331,367.10 = 121,378.60 : x
  2. Step 2: Convert to fraction form
    220,911.40/331,367.10 = 121,378.60/x
  3. Step 3: Cross multiply
    220,911.40x = 331,367.10 × 121,378.60
  4. Step 4: Simplify right side
    220,911.40x = 40,220,874,684.06
  5. Step 5: Solve for x
    x = 40,220,874,684.06/220,911.40
  6. Step 6: Final answer
    x = 182,067.90

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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.