Home / 214,208.96-321,380.58-128,912.90

Finding the Fourth Proportional to 214,208.96, 321,380.58 and 128,912.90

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Solution

The fourth proportional to 214,208.96, 321,380.58 and 128,912.90 is: 193,409.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,208.96 : 321,380.58 = 128,912.90 : x
  2. Step 2: Convert to fraction form
    214,208.96/321,380.58 = 128,912.90/x
  3. Step 3: Cross multiply
    214,208.96x = 321,380.58 × 128,912.90
  4. Step 4: Simplify right side
    214,208.96x = 41,430,102,571.48
  5. Step 5: Solve for x
    x = 41,430,102,571.48/214,208.96
  6. Step 6: Final answer
    x = 193,409.76

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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.