Home / 100,376.21-138,519.37-55,054.56

Finding the Fourth Proportional to 100,376.21, 138,519.37 and 55,054.56

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Solution

The fourth proportional to 100,376.21, 138,519.37 and 55,054.56 is: 75,975.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,376.21 : 138,519.37 = 55,054.56 : x
  2. Step 2: Convert to fraction form
    100,376.21/138,519.37 = 55,054.56/x
  3. Step 3: Cross multiply
    100,376.21x = 138,519.37 × 55,054.56
  4. Step 4: Simplify right side
    100,376.21x = 7,626,123,468.31
  5. Step 5: Solve for x
    x = 7,626,123,468.31/100,376.21
  6. Step 6: Final answer
    x = 75,975.41

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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.