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Finding the Fourth Proportional to 217,507.92, 300,174.72 and 122,020.80

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Solution

The fourth proportional to 217,507.92, 300,174.72 and 122,020.80 is: 168,396.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,507.92 : 300,174.72 = 122,020.80 : x
  2. Step 2: Convert to fraction form
    217,507.92/300,174.72 = 122,020.80/x
  3. Step 3: Cross multiply
    217,507.92x = 300,174.72 × 122,020.80
  4. Step 4: Simplify right side
    217,507.92x = 36,627,559,474.18
  5. Step 5: Solve for x
    x = 36,627,559,474.18/217,507.92
  6. Step 6: Final answer
    x = 168,396.44

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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.