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Finding the Fourth Proportional to 214,620.40, 321,930.60 and 126,046.90

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Solution

The fourth proportional to 214,620.40, 321,930.60 and 126,046.90 is: 189,070.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,620.40 : 321,930.60 = 126,046.90 : x
  2. Step 2: Convert to fraction form
    214,620.40/321,930.60 = 126,046.90/x
  3. Step 3: Cross multiply
    214,620.40x = 321,930.60 × 126,046.90
  4. Step 4: Simplify right side
    214,620.40x = 40,578,354,145.14
  5. Step 5: Solve for x
    x = 40,578,354,145.14/214,620.40
  6. Step 6: Final answer
    x = 189,070.35

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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.