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Finding the Fourth Proportional to 217,899.86, 300,729.89 and 122,425.01

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Solution

The fourth proportional to 217,899.86, 300,729.89 and 122,425.01 is: 168,962.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,899.86 : 300,729.89 = 122,425.01 : x
  2. Step 2: Convert to fraction form
    217,899.86/300,729.89 = 122,425.01/x
  3. Step 3: Cross multiply
    217,899.86x = 300,729.89 × 122,425.01
  4. Step 4: Simplify right side
    217,899.86x = 36,816,857,674.77
  5. Step 5: Solve for x
    x = 36,816,857,674.77/217,899.86
  6. Step 6: Final answer
    x = 168,962.29

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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.