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Finding the Fourth Proportional to 65,310.31, 90,129.22 and 36,636.33

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Solution

The fourth proportional to 65,310.31, 90,129.22 and 36,636.33 is: 50,558.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,310.31 : 90,129.22 = 36,636.33 : x
  2. Step 2: Convert to fraction form
    65,310.31/90,129.22 = 36,636.33/x
  3. Step 3: Cross multiply
    65,310.31x = 90,129.22 × 36,636.33
  4. Step 4: Simplify right side
    65,310.31x = 3,302,003,212.73
  5. Step 5: Solve for x
    x = 3,302,003,212.73/65,310.31
  6. Step 6: Final answer
    x = 50,558.68

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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.