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Finding the Fourth Proportional to 64,640.38, 89,212.25 and 36,351.54

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Solution

The fourth proportional to 64,640.38, 89,212.25 and 36,351.54 is: 50,169.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,640.38 : 89,212.25 = 36,351.54 : x
  2. Step 2: Convert to fraction form
    64,640.38/89,212.25 = 36,351.54/x
  3. Step 3: Cross multiply
    64,640.38x = 89,212.25 × 36,351.54
  4. Step 4: Simplify right side
    64,640.38x = 3,243,002,674.37
  5. Step 5: Solve for x
    x = 3,243,002,674.37/64,640.38
  6. Step 6: Final answer
    x = 50,169.92

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1.5x scale

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.