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Finding the Fourth Proportional to 217,511.94, 300,165.15 and 126,860.79

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Solution

The fourth proportional to 217,511.94, 300,165.15 and 126,860.79 is: 175,067.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,511.94 : 300,165.15 = 126,860.79 : x
  2. Step 2: Convert to fraction form
    217,511.94/300,165.15 = 126,860.79/x
  3. Step 3: Cross multiply
    217,511.94x = 300,165.15 × 126,860.79
  4. Step 4: Simplify right side
    217,511.94x = 38,079,188,059.47
  5. Step 5: Solve for x
    x = 38,079,188,059.47/217,511.94
  6. Step 6: Final answer
    x = 175,067.12

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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.