Home / 145,163.99-200,336.16-80,640.59

Finding the Fourth Proportional to 145,163.99, 200,336.16 and 80,640.59

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Solution

The fourth proportional to 145,163.99, 200,336.16 and 80,640.59 is: 111,289.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,163.99 : 200,336.16 = 80,640.59 : x
  2. Step 2: Convert to fraction form
    145,163.99/200,336.16 = 80,640.59/x
  3. Step 3: Cross multiply
    145,163.99x = 200,336.16 × 80,640.59
  4. Step 4: Simplify right side
    145,163.99x = 16,155,226,140.73
  5. Step 5: Solve for x
    x = 16,155,226,140.73/145,163.99
  6. Step 6: Final answer
    x = 111,289.49

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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.