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Finding the Fourth Proportional to 65,161.21, 89,912.91 and 36,479.38

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Solution

The fourth proportional to 65,161.21, 89,912.91 and 36,479.38 is: 50,336.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,161.21 : 89,912.91 = 36,479.38 : x
  2. Step 2: Convert to fraction form
    65,161.21/89,912.91 = 36,479.38/x
  3. Step 3: Cross multiply
    65,161.21x = 89,912.91 × 36,479.38
  4. Step 4: Simplify right side
    65,161.21x = 3,279,967,210.80
  5. Step 5: Solve for x
    x = 3,279,967,210.80/65,161.21
  6. Step 6: Final answer
    x = 50,336.19

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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.