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Finding the Fourth Proportional to 214,647.20, 321,842.80 and 131,600.80

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Solution

The fourth proportional to 214,647.20, 321,842.80 and 131,600.80 is: 197,322.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,647.20 : 321,842.80 = 131,600.80 : x
  2. Step 2: Convert to fraction form
    214,647.20/321,842.80 = 131,600.80/x
  3. Step 3: Cross multiply
    214,647.20x = 321,842.80 × 131,600.80
  4. Step 4: Simplify right side
    214,647.20x = 42,354,769,954.24
  5. Step 5: Solve for x
    x = 42,354,769,954.24/214,647.20
  6. Step 6: Final answer
    x = 197,322.72

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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.