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Finding the Fourth Proportional to 63,990.43, 95,999.65 and 19,620.65

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Solution

The fourth proportional to 63,990.43, 95,999.65 and 19,620.65 is: 29,435.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,990.43 : 95,999.65 = 19,620.65 : x
  2. Step 2: Convert to fraction form
    63,990.43/95,999.65 = 19,620.65/x
  3. Step 3: Cross multiply
    63,990.43x = 95,999.65 × 19,620.65
  4. Step 4: Simplify right side
    63,990.43x = 1,883,575,723.72
  5. Step 5: Solve for x
    x = 1,883,575,723.72/63,990.43
  6. Step 6: Final answer
    x = 29,435.27

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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.