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Finding the Fourth Proportional to 217,481.16, 300,103.86 and 121,969.44

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Solution

The fourth proportional to 217,481.16, 300,103.86 and 121,969.44 is: 168,306.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,481.16 : 300,103.86 = 121,969.44 : x
  2. Step 2: Convert to fraction form
    217,481.16/300,103.86 = 121,969.44/x
  3. Step 3: Cross multiply
    217,481.16x = 300,103.86 × 121,969.44
  4. Step 4: Simplify right side
    217,481.16x = 36,603,499,746.04
  5. Step 5: Solve for x
    x = 36,603,499,746.04/217,481.16
  6. Step 6: Final answer
    x = 168,306.53

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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.