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Finding the Fourth Proportional to 206,998.40, 310,497.60 and 66,771.20

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Solution

The fourth proportional to 206,998.40, 310,497.60 and 66,771.20 is: 100,156.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,998.40 : 310,497.60 = 66,771.20 : x
  2. Step 2: Convert to fraction form
    206,998.40/310,497.60 = 66,771.20/x
  3. Step 3: Cross multiply
    206,998.40x = 310,497.60 × 66,771.20
  4. Step 4: Simplify right side
    206,998.40x = 20,732,297,349.12
  5. Step 5: Solve for x
    x = 20,732,297,349.12/206,998.40
  6. Step 6: Final answer
    x = 100,156.80

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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.