Home / 68,189.40-102,299.57-20,808.72

Finding the Fourth Proportional to 68,189.40, 102,299.57 and 20,808.72

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Solution

The fourth proportional to 68,189.40, 102,299.57 and 20,808.72 is: 31,217.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,189.40 : 102,299.57 = 20,808.72 : x
  2. Step 2: Convert to fraction form
    68,189.40/102,299.57 = 20,808.72/x
  3. Step 3: Cross multiply
    68,189.40x = 102,299.57 × 20,808.72
  4. Step 4: Simplify right side
    68,189.40x = 2,128,722,596.75
  5. Step 5: Solve for x
    x = 2,128,722,596.75/68,189.40
  6. Step 6: Final answer
    x = 31,217.80

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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.