Home / 100,241.87-138,299.72-57,190.43

Finding the Fourth Proportional to 100,241.87, 138,299.72 and 57,190.43

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Solution

The fourth proportional to 100,241.87, 138,299.72 and 57,190.43 is: 78,903.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,241.87 : 138,299.72 = 57,190.43 : x
  2. Step 2: Convert to fraction form
    100,241.87/138,299.72 = 57,190.43/x
  3. Step 3: Cross multiply
    100,241.87x = 138,299.72 × 57,190.43
  4. Step 4: Simplify right side
    100,241.87x = 7,909,420,455.68
  5. Step 5: Solve for x
    x = 7,909,420,455.68/100,241.87
  6. Step 6: Final answer
    x = 78,903.36

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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.