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Finding the Fourth Proportional to 207,305.28, 286,065.48 and 122,406

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Solution

The fourth proportional to 207,305.28, 286,065.48 and 122,406 is: 168,910.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,305.28 : 286,065.48 = 122,406 : x
  2. Step 2: Convert to fraction form
    207,305.28/286,065.48 = 122,406/x
  3. Step 3: Cross multiply
    207,305.28x = 286,065.48 × 122,406
  4. Step 4: Simplify right side
    207,305.28x = 35,016,131,144.88
  5. Step 5: Solve for x
    x = 35,016,131,144.88/207,305.28
  6. Step 6: Final answer
    x = 168,910.95

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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.