Home / 68,218.20-102,284.42-20,817.56

Finding the Fourth Proportional to 68,218.20, 102,284.42 and 20,817.56

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Solution

The fourth proportional to 68,218.20, 102,284.42 and 20,817.56 is: 31,213.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,218.20 : 102,284.42 = 20,817.56 : x
  2. Step 2: Convert to fraction form
    68,218.20/102,284.42 = 20,817.56/x
  3. Step 3: Cross multiply
    68,218.20x = 102,284.42 × 20,817.56
  4. Step 4: Simplify right side
    68,218.20x = 2,129,311,743.79
  5. Step 5: Solve for x
    x = 2,129,311,743.79/68,218.20
  6. Step 6: Final answer
    x = 31,213.25

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1.5x scale

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.