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Finding the Fourth Proportional to 66,447.51, 99,657.67 and 19,049.90

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Solution

The fourth proportional to 66,447.51, 99,657.67 and 19,049.90 is: 28,570.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,447.51 : 99,657.67 = 19,049.90 : x
  2. Step 2: Convert to fraction form
    66,447.51/99,657.67 = 19,049.90/x
  3. Step 3: Cross multiply
    66,447.51x = 99,657.67 × 19,049.90
  4. Step 4: Simplify right side
    66,447.51x = 1,898,469,107.55
  5. Step 5: Solve for x
    x = 1,898,469,107.55/66,447.51
  6. Step 6: Final answer
    x = 28,570.96

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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.