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Finding the Fourth Proportional to 217,602.98, 300,321.96 and 122,115.32

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Solution

The fourth proportional to 217,602.98, 300,321.96 and 122,115.32 is: 168,535.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,602.98 : 300,321.96 = 122,115.32 : x
  2. Step 2: Convert to fraction form
    217,602.98/300,321.96 = 122,115.32/x
  3. Step 3: Cross multiply
    217,602.98x = 300,321.96 × 122,115.32
  4. Step 4: Simplify right side
    217,602.98x = 36,673,912,248.43
  5. Step 5: Solve for x
    x = 36,673,912,248.43/217,602.98
  6. Step 6: Final answer
    x = 168,535.89

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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.