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Finding the Fourth Proportional to 65,138.50, 89,891.16 and 36,843.58

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Solution

The fourth proportional to 65,138.50, 89,891.16 and 36,843.58 is: 50,844.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,138.50 : 89,891.16 = 36,843.58 : x
  2. Step 2: Convert to fraction form
    65,138.50/89,891.16 = 36,843.58/x
  3. Step 3: Cross multiply
    65,138.50x = 89,891.16 × 36,843.58
  4. Step 4: Simplify right side
    65,138.50x = 3,311,912,144.75
  5. Step 5: Solve for x
    x = 3,311,912,144.75/65,138.50
  6. Step 6: Final answer
    x = 50,844.16

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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.