Finding the Fourth Proportional to 138,694.25, 191,402.97 and 78,261.36
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Solution
The fourth proportional to 138,694.25, 191,402.97 and 78,261.36 is: 108,003.45
Step by Step Solution
- Step 1: Write the proportion equation
138,694.25 : 191,402.97 = 78,261.36 : x - Step 2: Convert to fraction form
138,694.25/191,402.97 = 78,261.36/x - Step 3: Cross multiply
138,694.25x = 191,402.97 × 78,261.36 - Step 4: Simplify right side
138,694.25x = 14,979,456,740.24 - Step 5: Solve for x
x = 14,979,456,740.24/138,694.25 - Step 6: Final answer
x = 108,003.45
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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.