Home / 100,180.50-138,249.09-55,471.38

Finding the Fourth Proportional to 100,180.50, 138,249.09 and 55,471.38

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Solution

The fourth proportional to 100,180.50, 138,249.09 and 55,471.38 is: 76,550.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,180.50 : 138,249.09 = 55,471.38 : x
  2. Step 2: Convert to fraction form
    100,180.50/138,249.09 = 55,471.38/x
  3. Step 3: Cross multiply
    100,180.50x = 138,249.09 × 55,471.38
  4. Step 4: Simplify right side
    100,180.50x = 7,668,867,806.04
  5. Step 5: Solve for x
    x = 7,668,867,806.04/100,180.50
  6. Step 6: Final answer
    x = 76,550.50

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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.