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Finding the Fourth Proportional to 66,175.92, 99,269.55 and 18,791.19

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Solution

The fourth proportional to 66,175.92, 99,269.55 and 18,791.19 is: 28,188.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,175.92 : 99,269.55 = 18,791.19 : x
  2. Step 2: Convert to fraction form
    66,175.92/99,269.55 = 18,791.19/x
  3. Step 3: Cross multiply
    66,175.92x = 99,269.55 × 18,791.19
  4. Step 4: Simplify right side
    66,175.92x = 1,865,392,975.26
  5. Step 5: Solve for x
    x = 1,865,392,975.26/66,175.92
  6. Step 6: Final answer
    x = 28,188.40

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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.