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Finding the Fourth Proportional to 217,873.45, 300,693.43 and 122,380.12

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Solution

The fourth proportional to 217,873.45, 300,693.43 and 122,380.12 is: 168,900.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,873.45 : 300,693.43 = 122,380.12 : x
  2. Step 2: Convert to fraction form
    217,873.45/300,693.43 = 122,380.12/x
  3. Step 3: Cross multiply
    217,873.45x = 300,693.43 × 122,380.12
  4. Step 4: Simplify right side
    217,873.45x = 36,798,898,046.61
  5. Step 5: Solve for x
    x = 36,798,898,046.61/217,873.45
  6. Step 6: Final answer
    x = 168,900.33

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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.