Finding the Fourth Proportional to 135,446.98, 186,918.21 and 81,721.61
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Solution
The fourth proportional to 135,446.98, 186,918.21 and 81,721.61 is: 112,776.65
Step by Step Solution
- Step 1: Write the proportion equation
135,446.98 : 186,918.21 = 81,721.61 : x - Step 2: Convert to fraction form
135,446.98/186,918.21 = 81,721.61/x - Step 3: Cross multiply
135,446.98x = 186,918.21 × 81,721.61 - Step 4: Simplify right side
135,446.98x = 15,275,256,650.91 - Step 5: Solve for x
x = 15,275,256,650.91/135,446.98 - Step 6: Final answer
x = 112,776.65
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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.