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Finding the Fourth Proportional to 206,460.80, 309,691.20 and 66,233.60

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Solution

The fourth proportional to 206,460.80, 309,691.20 and 66,233.60 is: 99,350.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,460.80 : 309,691.20 = 66,233.60 : x
  2. Step 2: Convert to fraction form
    206,460.80/309,691.20 = 66,233.60/x
  3. Step 3: Cross multiply
    206,460.80x = 309,691.20 × 66,233.60
  4. Step 4: Simplify right side
    206,460.80x = 20,511,963,064.32
  5. Step 5: Solve for x
    x = 20,511,963,064.32/206,460.80
  6. Step 6: Final answer
    x = 99,350.40

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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.