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Finding the Fourth Proportional to 206,367.21, 309,565.53 and 71,375.31

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Solution

The fourth proportional to 206,367.21, 309,565.53 and 71,375.31 is: 107,068.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,367.21 : 309,565.53 = 71,375.31 : x
  2. Step 2: Convert to fraction form
    206,367.21/309,565.53 = 71,375.31/x
  3. Step 3: Cross multiply
    206,367.21x = 309,565.53 × 71,375.31
  4. Step 4: Simplify right side
    206,367.21x = 22,095,335,669.06
  5. Step 5: Solve for x
    x = 22,095,335,669.06/206,367.21
  6. Step 6: Final answer
    x = 107,068.05

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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.