Finding the Fourth Proportional to 138,754.21, 191,481.30 and 75,091.99
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Solution
The fourth proportional to 138,754.21, 191,481.30 and 75,091.99 is: 103,627.21
Step by Step Solution
- Step 1: Write the proportion equation
138,754.21 : 191,481.30 = 75,091.99 : x - Step 2: Convert to fraction form
138,754.21/191,481.30 = 75,091.99/x - Step 3: Cross multiply
138,754.21x = 191,481.30 × 75,091.99 - Step 4: Simplify right side
138,754.21x = 14,378,711,864.79 - Step 5: Solve for x
x = 14,378,711,864.79/138,754.21 - Step 6: Final answer
x = 103,627.21
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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.