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Finding the Fourth Proportional to 206,562.60, 309,930.30 and 66,364.20

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Solution

The fourth proportional to 206,562.60, 309,930.30 and 66,364.20 is: 99,574.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,562.60 : 309,930.30 = 66,364.20 : x
  2. Step 2: Convert to fraction form
    206,562.60/309,930.30 = 66,364.20/x
  3. Step 3: Cross multiply
    206,562.60x = 309,930.30 × 66,364.20
  4. Step 4: Simplify right side
    206,562.60x = 20,568,276,415.26
  5. Step 5: Solve for x
    x = 20,568,276,415.26/206,562.60
  6. Step 6: Final answer
    x = 99,574.06

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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.