Finding the Fourth Proportional to 128,965.24, 193,418.90 and 54,169.84
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Solution
The fourth proportional to 128,965.24, 193,418.90 and 54,169.84 is: 81,242.59
Step by Step Solution
- Step 1: Write the proportion equation
128,965.24 : 193,418.90 = 54,169.84 : x - Step 2: Convert to fraction form
128,965.24/193,418.90 = 54,169.84/x - Step 3: Cross multiply
128,965.24x = 193,418.90 × 54,169.84 - Step 4: Simplify right side
128,965.24x = 10,477,469,628.03 - Step 5: Solve for x
x = 10,477,469,628.03/128,965.24 - Step 6: Final answer
x = 81,242.59
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.