Home / 139,198.06-192,090.63-78,767.59

Finding the Fourth Proportional to 139,198.06, 192,090.63 and 78,767.59

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Solution

The fourth proportional to 139,198.06, 192,090.63 and 78,767.59 is: 108,697.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,198.06 : 192,090.63 = 78,767.59 : x
  2. Step 2: Convert to fraction form
    139,198.06/192,090.63 = 78,767.59/x
  3. Step 3: Cross multiply
    139,198.06x = 192,090.63 × 78,767.59
  4. Step 4: Simplify right side
    139,198.06x = 15,130,515,986.68
  5. Step 5: Solve for x
    x = 15,130,515,986.68/139,198.06
  6. Step 6: Final answer
    x = 108,697.75

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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.