Finding the Fourth Proportional to 87,945.62, 131,916.58 and 21,386.09
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Solution
The fourth proportional to 87,945.62, 131,916.58 and 21,386.09 is: 32,078.69
Step by Step Solution
- Step 1: Write the proportion equation
87,945.62 : 131,916.58 = 21,386.09 : x - Step 2: Convert to fraction form
87,945.62/131,916.58 = 21,386.09/x - Step 3: Cross multiply
87,945.62x = 131,916.58 × 21,386.09 - Step 4: Simplify right side
87,945.62x = 2,821,179,852.37 - Step 5: Solve for x
x = 2,821,179,852.37/87,945.62 - Step 6: Final answer
x = 32,078.69
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1.5x scale
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.