Home / 100,108.37-138,147.70-54,785.45

Finding the Fourth Proportional to 100,108.37, 138,147.70 and 54,785.45

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Solution

The fourth proportional to 100,108.37, 138,147.70 and 54,785.45 is: 75,602.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,108.37 : 138,147.70 = 54,785.45 : x
  2. Step 2: Convert to fraction form
    100,108.37/138,147.70 = 54,785.45/x
  3. Step 3: Cross multiply
    100,108.37x = 138,147.70 × 54,785.45
  4. Step 4: Simplify right side
    100,108.37x = 7,568,483,910.97
  5. Step 5: Solve for x
    x = 7,568,483,910.97/100,108.37
  6. Step 6: Final answer
    x = 75,602.91

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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.