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Finding the Fourth Proportional to 159,286.50, 219,812.74 and 87,665.09

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Solution

The fourth proportional to 159,286.50, 219,812.74 and 87,665.09 is: 120,976.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,286.50 : 219,812.74 = 87,665.09 : x
  2. Step 2: Convert to fraction form
    159,286.50/219,812.74 = 87,665.09/x
  3. Step 3: Cross multiply
    159,286.50x = 219,812.74 × 87,665.09
  4. Step 4: Simplify right side
    159,286.50x = 19,269,902,317.02
  5. Step 5: Solve for x
    x = 19,269,902,317.02/159,286.50
  6. Step 6: Final answer
    x = 120,976.37

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1.5x scale

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.