Finding the Fourth Proportional to 135,456.14, 186,930.84 and 81,730.78
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Solution
The fourth proportional to 135,456.14, 186,930.84 and 81,730.78 is: 112,789.30
Step by Step Solution
- Step 1: Write the proportion equation
135,456.14 : 186,930.84 = 81,730.78 : x - Step 2: Convert to fraction form
135,456.14/186,930.84 = 81,730.78/x - Step 3: Cross multiply
135,456.14x = 186,930.84 × 81,730.78 - Step 4: Simplify right side
135,456.14x = 15,278,003,359.26 - Step 5: Solve for x
x = 15,278,003,359.26/135,456.14 - Step 6: Final answer
x = 112,789.30
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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.