Home / 117,144.87-161,539.09-100,205.19

Finding the Fourth Proportional to 117,144.87, 161,539.09 and 100,205.19

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Solution

The fourth proportional to 117,144.87, 161,539.09 and 100,205.19 is: 138,179.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,144.87 : 161,539.09 = 100,205.19 : x
  2. Step 2: Convert to fraction form
    117,144.87/161,539.09 = 100,205.19/x
  3. Step 3: Cross multiply
    117,144.87x = 161,539.09 × 100,205.19
  4. Step 4: Simplify right side
    117,144.87x = 16,187,055,205.88
  5. Step 5: Solve for x
    x = 16,187,055,205.88/117,144.87
  6. Step 6: Final answer
    x = 138,179.80

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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.