Home / 206,427.90-309,685.05-66,200.70

Finding the Fourth Proportional to 206,427.90, 309,685.05 and 66,200.70

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Solution

The fourth proportional to 206,427.90, 309,685.05 and 66,200.70 is: 99,314.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,427.90 : 309,685.05 = 66,200.70 : x
  2. Step 2: Convert to fraction form
    206,427.90/309,685.05 = 66,200.70/x
  3. Step 3: Cross multiply
    206,427.90x = 309,685.05 × 66,200.70
  4. Step 4: Simplify right side
    206,427.90x = 20,501,367,089.54
  5. Step 5: Solve for x
    x = 20,501,367,089.54/206,427.90
  6. Step 6: Final answer
    x = 99,314.90

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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.