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Finding the Fourth Proportional to 105,616.91, 158,757.52 and 91,749.62

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Solution

The fourth proportional to 105,616.91, 158,757.52 and 91,749.62 is: 137,912.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,616.91 : 158,757.52 = 91,749.62 : x
  2. Step 2: Convert to fraction form
    105,616.91/158,757.52 = 91,749.62/x
  3. Step 3: Cross multiply
    105,616.91x = 158,757.52 × 91,749.62
  4. Step 4: Simplify right side
    105,616.91x = 14,565,942,132.14
  5. Step 5: Solve for x
    x = 14,565,942,132.14/105,616.91
  6. Step 6: Final answer
    x = 137,912.97

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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.