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Finding the Fourth Proportional to 211,173.80, 316,694.46 and 68,986.67

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Solution

The fourth proportional to 211,173.80, 316,694.46 and 68,986.67 is: 103,458.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,173.80 : 316,694.46 = 68,986.67 : x
  2. Step 2: Convert to fraction form
    211,173.80/316,694.46 = 68,986.67/x
  3. Step 3: Cross multiply
    211,173.80x = 316,694.46 × 68,986.67
  4. Step 4: Simplify right side
    211,173.80x = 21,847,694,619.38
  5. Step 5: Solve for x
    x = 21,847,694,619.38/211,173.80
  6. Step 6: Final answer
    x = 103,458.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.