Finding the Fourth Proportional to 143,943.40, 198,577.65 and 83,478.99
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Solution
The fourth proportional to 143,943.40, 198,577.65 and 83,478.99 is: 115,163.75
Step by Step Solution
- Step 1: Write the proportion equation
143,943.40 : 198,577.65 = 83,478.99 : x - Step 2: Convert to fraction form
143,943.40/198,577.65 = 83,478.99/x - Step 3: Cross multiply
143,943.40x = 198,577.65 × 83,478.99 - Step 4: Simplify right side
143,943.40x = 16,577,061,658.57 - Step 5: Solve for x
x = 16,577,061,658.57/143,943.40 - Step 6: Final answer
x = 115,163.75
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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.