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Finding the Fourth Proportional to 62,277, 85,942.28 and 39,921

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Solution

The fourth proportional to 62,277, 85,942.28 and 39,921 is: 55,090.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,277 : 85,942.28 = 39,921 : x
  2. Step 2: Convert to fraction form
    62,277/85,942.28 = 39,921/x
  3. Step 3: Cross multiply
    62,277x = 85,942.28 × 39,921
  4. Step 4: Simplify right side
    62,277x = 3,430,901,759.88
  5. Step 5: Solve for x
    x = 3,430,901,759.88/62,277
  6. Step 6: Final answer
    x = 55,090.99

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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.