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Finding the Fourth Proportional to 49,081.78, 73,621.86 and 12,145.78

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Solution

The fourth proportional to 49,081.78, 73,621.86 and 12,145.78 is: 18,218.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,081.78 : 73,621.86 = 12,145.78 : x
  2. Step 2: Convert to fraction form
    49,081.78/73,621.86 = 12,145.78/x
  3. Step 3: Cross multiply
    49,081.78x = 73,621.86 × 12,145.78
  4. Step 4: Simplify right side
    49,081.78x = 894,194,914.75
  5. Step 5: Solve for x
    x = 894,194,914.75/49,081.78
  6. Step 6: Final answer
    x = 18,218.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.