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Finding the Fourth Proportional to 62,781, 86,652.70 and 35,939

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Solution

The fourth proportional to 62,781, 86,652.70 and 35,939 is: 49,604.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,781 : 86,652.70 = 35,939 : x
  2. Step 2: Convert to fraction form
    62,781/86,652.70 = 35,939/x
  3. Step 3: Cross multiply
    62,781x = 86,652.70 × 35,939
  4. Step 4: Simplify right side
    62,781x = 3,114,211,385.30
  5. Step 5: Solve for x
    x = 3,114,211,385.30/62,781
  6. Step 6: Final answer
    x = 49,604.36

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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.