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Finding the Fourth Proportional to 217,911.14, 300,715.56 and 122,415.78

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Solution

The fourth proportional to 217,911.14, 300,715.56 and 122,415.78 is: 168,932.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,911.14 : 300,715.56 = 122,415.78 : x
  2. Step 2: Convert to fraction form
    217,911.14/300,715.56 = 122,415.78/x
  3. Step 3: Cross multiply
    217,911.14x = 300,715.56 × 122,415.78
  4. Step 4: Simplify right side
    217,911.14x = 36,812,329,835.54
  5. Step 5: Solve for x
    x = 36,812,329,835.54/217,911.14
  6. Step 6: Final answer
    x = 168,932.76

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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.