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Finding the Fourth Proportional to 217,665.96, 326,624.99 and 91,294.95

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Solution

The fourth proportional to 217,665.96, 326,624.99 and 91,294.95 is: 136,995.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,665.96 : 326,624.99 = 91,294.95 : x
  2. Step 2: Convert to fraction form
    217,665.96/326,624.99 = 91,294.95/x
  3. Step 3: Cross multiply
    217,665.96x = 326,624.99 × 91,294.95
  4. Step 4: Simplify right side
    217,665.96x = 29,819,212,359.04
  5. Step 5: Solve for x
    x = 29,819,212,359.04/217,665.96
  6. Step 6: Final answer
    x = 136,995.29

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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.