Finding the Fourth Proportional to 143,684.19, 198,290.35 and 80,021.99
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Solution
The fourth proportional to 143,684.19, 198,290.35 and 80,021.99 is: 110,433.78
Step by Step Solution
- Step 1: Write the proportion equation
143,684.19 : 198,290.35 = 80,021.99 : x - Step 2: Convert to fraction form
143,684.19/198,290.35 = 80,021.99/x - Step 3: Cross multiply
143,684.19x = 198,290.35 × 80,021.99 - Step 4: Simplify right side
143,684.19x = 15,867,588,389.07 - Step 5: Solve for x
x = 15,867,588,389.07/143,684.19 - Step 6: Final answer
x = 110,433.78
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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.