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Finding the Fourth Proportional to 214,191.66, 321,290.82 and 81,134.58

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Solution

The fourth proportional to 214,191.66, 321,290.82 and 81,134.58 is: 121,703.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,191.66 : 321,290.82 = 81,134.58 : x
  2. Step 2: Convert to fraction form
    214,191.66/321,290.82 = 81,134.58/x
  3. Step 3: Cross multiply
    214,191.66x = 321,290.82 × 81,134.58
  4. Step 4: Simplify right side
    214,191.66x = 26,067,795,738.56
  5. Step 5: Solve for x
    x = 26,067,795,738.56/214,191.66
  6. Step 6: Final answer
    x = 121,703.13

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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.