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Finding the Fourth Proportional to 217,935.64, 300,758.88 and 122,440.42

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Solution

The fourth proportional to 217,935.64, 300,758.88 and 122,440.42 is: 168,972.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,935.64 : 300,758.88 = 122,440.42 : x
  2. Step 2: Convert to fraction form
    217,935.64/300,758.88 = 122,440.42/x
  3. Step 3: Cross multiply
    217,935.64x = 300,758.88 × 122,440.42
  4. Step 4: Simplify right side
    217,935.64x = 36,825,043,585.93
  5. Step 5: Solve for x
    x = 36,825,043,585.93/217,935.64
  6. Step 6: Final answer
    x = 168,972.10

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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.