Finding the Fourth Proportional to 87,191.57, 120,328.32 and 51,383.09
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Solution
The fourth proportional to 87,191.57, 120,328.32 and 51,383.09 is: 70,910.99
Step by Step Solution
- Step 1: Write the proportion equation
87,191.57 : 120,328.32 = 51,383.09 : x - Step 2: Convert to fraction form
87,191.57/120,328.32 = 51,383.09/x - Step 3: Cross multiply
87,191.57x = 120,328.32 × 51,383.09 - Step 4: Simplify right side
87,191.57x = 6,182,840,896.11 - Step 5: Solve for x
x = 6,182,840,896.11/87,191.57 - Step 6: Final answer
x = 70,910.99
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1.5x scale
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.