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Finding the Fourth Proportional to 214,606.32, 321,909.52 and 81,486.64

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Solution

The fourth proportional to 214,606.32, 321,909.52 and 81,486.64 is: 122,229.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,606.32 : 321,909.52 = 81,486.64 : x
  2. Step 2: Convert to fraction form
    214,606.32/321,909.52 = 81,486.64/x
  3. Step 3: Cross multiply
    214,606.32x = 321,909.52 × 81,486.64
  4. Step 4: Simplify right side
    214,606.32x = 26,231,325,168.81
  5. Step 5: Solve for x
    x = 26,231,325,168.81/214,606.32
  6. Step 6: Final answer
    x = 122,229.98

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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.