Finding the Fourth Proportional to 135,436.91, 186,963.93 and 87,109.07
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Solution
The fourth proportional to 135,436.91, 186,963.93 and 87,109.07 is: 120,249.74
Step by Step Solution
- Step 1: Write the proportion equation
135,436.91 : 186,963.93 = 87,109.07 : x - Step 2: Convert to fraction form
135,436.91/186,963.93 = 87,109.07/x - Step 3: Cross multiply
135,436.91x = 186,963.93 × 87,109.07 - Step 4: Simplify right side
135,436.91x = 16,286,253,131.03 - Step 5: Solve for x
x = 16,286,253,131.03/135,436.91 - Step 6: Final answer
x = 120,249.74
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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.