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Finding the Fourth Proportional to 217,717.70, 300,429.69 and 122,202.50

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Solution

The fourth proportional to 217,717.70, 300,429.69 and 122,202.50 is: 168,627.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,717.70 : 300,429.69 = 122,202.50 : x
  2. Step 2: Convert to fraction form
    217,717.70/300,429.69 = 122,202.50/x
  3. Step 3: Cross multiply
    217,717.70x = 300,429.69 × 122,202.50
  4. Step 4: Simplify right side
    217,717.70x = 36,713,259,192.23
  5. Step 5: Solve for x
    x = 36,713,259,192.23/217,717.70
  6. Step 6: Final answer
    x = 168,627.81

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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.