Finding the Fourth Proportional to 138,676.84, 191,313.26 and 81,287.08
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Solution
The fourth proportional to 138,676.84, 191,313.26 and 81,287.08 is: 112,140.54
Step by Step Solution
- Step 1: Write the proportion equation
138,676.84 : 191,313.26 = 81,287.08 : x - Step 2: Convert to fraction form
138,676.84/191,313.26 = 81,287.08/x - Step 3: Cross multiply
138,676.84x = 191,313.26 × 81,287.08 - Step 4: Simplify right side
138,676.84x = 15,551,296,270.68 - Step 5: Solve for x
x = 15,551,296,270.68/138,676.84 - Step 6: Final answer
x = 112,140.54
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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.