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Finding the Fourth Proportional to 159,589.96, 220,245.42 and 91,618

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Solution

The fourth proportional to 159,589.96, 220,245.42 and 91,618 is: 126,439.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,589.96 : 220,245.42 = 91,618 : x
  2. Step 2: Convert to fraction form
    159,589.96/220,245.42 = 91,618/x
  3. Step 3: Cross multiply
    159,589.96x = 220,245.42 × 91,618
  4. Step 4: Simplify right side
    159,589.96x = 20,178,444,889.56
  5. Step 5: Solve for x
    x = 20,178,444,889.56/159,589.96
  6. Step 6: Final answer
    x = 126,439.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.