Home / 138,105.54-190,557.06-80,733.78

Finding the Fourth Proportional to 138,105.54, 190,557.06 and 80,733.78

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Solution

The fourth proportional to 138,105.54, 190,557.06 and 80,733.78 is: 111,395.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,105.54 : 190,557.06 = 80,733.78 : x
  2. Step 2: Convert to fraction form
    138,105.54/190,557.06 = 80,733.78/x
  3. Step 3: Cross multiply
    138,105.54x = 190,557.06 × 80,733.78
  4. Step 4: Simplify right side
    138,105.54x = 15,384,391,759.49
  5. Step 5: Solve for x
    x = 15,384,391,759.49/138,105.54
  6. Step 6: Final answer
    x = 111,395.91

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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.