Home / 145,621.43-200,939.87-81,074.50

Finding the Fourth Proportional to 145,621.43, 200,939.87 and 81,074.50

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Solution

The fourth proportional to 145,621.43, 200,939.87 and 81,074.50 is: 111,872.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,621.43 : 200,939.87 = 81,074.50 : x
  2. Step 2: Convert to fraction form
    145,621.43/200,939.87 = 81,074.50/x
  3. Step 3: Cross multiply
    145,621.43x = 200,939.87 × 81,074.50
  4. Step 4: Simplify right side
    145,621.43x = 16,291,099,190.65
  5. Step 5: Solve for x
    x = 16,291,099,190.65/145,621.43
  6. Step 6: Final answer
    x = 111,872.95

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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.