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Finding the Fourth Proportional to 229,640.20, 344,469.90 and 122,979.40

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Solution

The fourth proportional to 229,640.20, 344,469.90 and 122,979.40 is: 184,474.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,640.20 : 344,469.90 = 122,979.40 : x
  2. Step 2: Convert to fraction form
    229,640.20/344,469.90 = 122,979.40/x
  3. Step 3: Cross multiply
    229,640.20x = 344,469.90 × 122,979.40
  4. Step 4: Simplify right side
    229,640.20x = 42,362,701,620.06
  5. Step 5: Solve for x
    x = 42,362,701,620.06/229,640.20
  6. Step 6: Final answer
    x = 184,474.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.