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Finding the Fourth Proportional to 206,795.76, 309,996.48 and 66,455.76

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Solution

The fourth proportional to 206,795.76, 309,996.48 and 66,455.76 is: 99,620.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,795.76 : 309,996.48 = 66,455.76 : x
  2. Step 2: Convert to fraction form
    206,795.76/309,996.48 = 66,455.76/x
  3. Step 3: Cross multiply
    206,795.76x = 309,996.48 × 66,455.76
  4. Step 4: Simplify right side
    206,795.76x = 20,601,051,675.72
  5. Step 5: Solve for x
    x = 20,601,051,675.72/206,795.76
  6. Step 6: Final answer
    x = 99,620.28

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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.