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Finding the Fourth Proportional to 217,856.34, 300,635.75 and 121,057.70

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Solution

The fourth proportional to 217,856.34, 300,635.75 and 121,057.70 is: 167,056.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,856.34 : 300,635.75 = 121,057.70 : x
  2. Step 2: Convert to fraction form
    217,856.34/300,635.75 = 121,057.70/x
  3. Step 3: Cross multiply
    217,856.34x = 300,635.75 × 121,057.70
  4. Step 4: Simplify right side
    217,856.34x = 36,394,270,324.31
  5. Step 5: Solve for x
    x = 36,394,270,324.31/217,856.34
  6. Step 6: Final answer
    x = 167,056.28

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1.5x scale

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.