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Finding the Fourth Proportional to 217,665.41, 300,361.79 and 122,153.66

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Solution

The fourth proportional to 217,665.41, 300,361.79 and 122,153.66 is: 168,562.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,665.41 : 300,361.79 = 122,153.66 : x
  2. Step 2: Convert to fraction form
    217,665.41/300,361.79 = 122,153.66/x
  3. Step 3: Cross multiply
    217,665.41x = 300,361.79 × 122,153.66
  4. Step 4: Simplify right side
    217,665.41x = 36,690,289,860.07
  5. Step 5: Solve for x
    x = 36,690,289,860.07/217,665.41
  6. Step 6: Final answer
    x = 168,562.80

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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.