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Finding the Fourth Proportional to 217,486.44, 300,111.12 and 121,974.66

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Solution

The fourth proportional to 217,486.44, 300,111.12 and 121,974.66 is: 168,313.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,486.44 : 300,111.12 = 121,974.66 : x
  2. Step 2: Convert to fraction form
    217,486.44/300,111.12 = 121,974.66/x
  3. Step 3: Cross multiply
    217,486.44x = 300,111.12 × 121,974.66
  4. Step 4: Simplify right side
    217,486.44x = 36,605,951,824.22
  5. Step 5: Solve for x
    x = 36,605,951,824.22/217,486.44
  6. Step 6: Final answer
    x = 168,313.72

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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.