Finding the Fourth Proportional to 143,944.20, 215,916.30 and 128,197.80
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Solution
The fourth proportional to 143,944.20, 215,916.30 and 128,197.80 is: 192,296.70
Step by Step Solution
- Step 1: Write the proportion equation
143,944.20 : 215,916.30 = 128,197.80 : x - Step 2: Convert to fraction form
143,944.20/215,916.30 = 128,197.80/x - Step 3: Cross multiply
143,944.20x = 215,916.30 × 128,197.80 - Step 4: Simplify right side
143,944.20x = 27,679,994,644.14 - Step 5: Solve for x
x = 27,679,994,644.14/143,944.20 - Step 6: Final answer
x = 192,296.70
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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.