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Finding the Fourth Proportional to 217,715.82, 300,427.29 and 122,203.86

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Solution

The fourth proportional to 217,715.82, 300,427.29 and 122,203.86 is: 168,629.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,715.82 : 300,427.29 = 122,203.86 : x
  2. Step 2: Convert to fraction form
    217,715.82/300,427.29 = 122,203.86/x
  3. Step 3: Cross multiply
    217,715.82x = 300,427.29 × 122,203.86
  4. Step 4: Simplify right side
    217,715.82x = 36,713,374,487.34
  5. Step 5: Solve for x
    x = 36,713,374,487.34/217,715.82
  6. Step 6: Final answer
    x = 168,629.80

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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.