Home / 100,412.97-138,571.32-55,090.13

Finding the Fourth Proportional to 100,412.97, 138,571.32 and 55,090.13

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Solution

The fourth proportional to 100,412.97, 138,571.32 and 55,090.13 is: 76,025.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,412.97 : 138,571.32 = 55,090.13 : x
  2. Step 2: Convert to fraction form
    100,412.97/138,571.32 = 55,090.13/x
  3. Step 3: Cross multiply
    100,412.97x = 138,571.32 × 55,090.13
  4. Step 4: Simplify right side
    100,412.97x = 7,633,912,241.77
  5. Step 5: Solve for x
    x = 7,633,912,241.77/100,412.97
  6. Step 6: Final answer
    x = 76,025.16

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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.