Finding the Fourth Proportional to 143,142.72, 197,542.98 and 79,486.44
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Solution
The fourth proportional to 143,142.72, 197,542.98 and 79,486.44 is: 109,694.63
Step by Step Solution
- Step 1: Write the proportion equation
143,142.72 : 197,542.98 = 79,486.44 : x - Step 2: Convert to fraction form
143,142.72/197,542.98 = 79,486.44/x - Step 3: Cross multiply
143,142.72x = 197,542.98 × 79,486.44 - Step 4: Simplify right side
143,142.72x = 15,701,988,227.19 - Step 5: Solve for x
x = 15,701,988,227.19/143,142.72 - Step 6: Final answer
x = 109,694.63
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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.