Home / 138,101.03-190,550.85-80,729.27

Finding the Fourth Proportional to 138,101.03, 190,550.85 and 80,729.27

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Solution

The fourth proportional to 138,101.03, 190,550.85 and 80,729.27 is: 111,389.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,101.03 : 190,550.85 = 80,729.27 : x
  2. Step 2: Convert to fraction form
    138,101.03/190,550.85 = 80,729.27/x
  3. Step 3: Cross multiply
    138,101.03x = 190,550.85 × 80,729.27
  4. Step 4: Simplify right side
    138,101.03x = 15,383,031,018.38
  5. Step 5: Solve for x
    x = 15,383,031,018.38/138,101.03
  6. Step 6: Final answer
    x = 111,389.69

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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.