Home / 111,085.26-153,138.18-79,198.80

Finding the Fourth Proportional to 111,085.26, 153,138.18 and 79,198.80

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Solution

The fourth proportional to 111,085.26, 153,138.18 and 79,198.80 is: 109,180.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,085.26 : 153,138.18 = 79,198.80 : x
  2. Step 2: Convert to fraction form
    111,085.26/153,138.18 = 79,198.80/x
  3. Step 3: Cross multiply
    111,085.26x = 153,138.18 × 79,198.80
  4. Step 4: Simplify right side
    111,085.26x = 12,128,360,090.18
  5. Step 5: Solve for x
    x = 12,128,360,090.18/111,085.26
  6. Step 6: Final answer
    x = 109,180.64

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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.