Home / 100,081.08-138,121.26-55,383.48

Finding the Fourth Proportional to 100,081.08, 138,121.26 and 55,383.48

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Solution

The fourth proportional to 100,081.08, 138,121.26 and 55,383.48 is: 76,434.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,081.08 : 138,121.26 = 55,383.48 : x
  2. Step 2: Convert to fraction form
    100,081.08/138,121.26 = 55,383.48/x
  3. Step 3: Cross multiply
    100,081.08x = 138,121.26 × 55,383.48
  4. Step 4: Simplify right side
    100,081.08x = 7,649,636,040.78
  5. Step 5: Solve for x
    x = 7,649,636,040.78/100,081.08
  6. Step 6: Final answer
    x = 76,434.39

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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.