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Finding the Fourth Proportional to 66,665.52, 91,956 and 50,715

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Solution

The fourth proportional to 66,665.52, 91,956 and 50,715 is: 69,954.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,665.52 : 91,956 = 50,715 : x
  2. Step 2: Convert to fraction form
    66,665.52/91,956 = 50,715/x
  3. Step 3: Cross multiply
    66,665.52x = 91,956 × 50,715
  4. Step 4: Simplify right side
    66,665.52x = 4,663,548,540
  5. Step 5: Solve for x
    x = 4,663,548,540/66,665.52
  6. Step 6: Final answer
    x = 69,954.43

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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.