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Finding the Fourth Proportional to 66,884.87, 92,269.32 and 40,021.97

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Solution

The fourth proportional to 66,884.87, 92,269.32 and 40,021.97 is: 55,211.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,884.87 : 92,269.32 = 40,021.97 : x
  2. Step 2: Convert to fraction form
    66,884.87/92,269.32 = 40,021.97/x
  3. Step 3: Cross multiply
    66,884.87x = 92,269.32 × 40,021.97
  4. Step 4: Simplify right side
    66,884.87x = 3,692,799,956.96
  5. Step 5: Solve for x
    x = 3,692,799,956.96/66,884.87
  6. Step 6: Final answer
    x = 55,211.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.