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Finding the Fourth Proportional to 66,328, 91,532.73 and 36,520

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Solution

The fourth proportional to 66,328, 91,532.73 and 36,520 is: 50,397.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,328 : 91,532.73 = 36,520 : x
  2. Step 2: Convert to fraction form
    66,328/91,532.73 = 36,520/x
  3. Step 3: Cross multiply
    66,328x = 91,532.73 × 36,520
  4. Step 4: Simplify right side
    66,328x = 3,342,775,299.60
  5. Step 5: Solve for x
    x = 3,342,775,299.60/66,328
  6. Step 6: Final answer
    x = 50,397.65

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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.