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Finding the Fourth Proportional to 67,321.80, 100,982.70 and 19,938.60

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Solution

The fourth proportional to 67,321.80, 100,982.70 and 19,938.60 is: 29,907.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,321.80 : 100,982.70 = 19,938.60 : x
  2. Step 2: Convert to fraction form
    67,321.80/100,982.70 = 19,938.60/x
  3. Step 3: Cross multiply
    67,321.80x = 100,982.70 × 19,938.60
  4. Step 4: Simplify right side
    67,321.80x = 2,013,453,662.22
  5. Step 5: Solve for x
    x = 2,013,453,662.22/67,321.80
  6. Step 6: Final answer
    x = 29,907.90

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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.