Finding the Fourth Proportional to 81,161.13, 121,785.30 and 39,608.13
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Solution
The fourth proportional to 81,161.13, 121,785.30 and 39,608.13 is: 59,433.48
Step by Step Solution
- Step 1: Write the proportion equation
81,161.13 : 121,785.30 = 39,608.13 : x - Step 2: Convert to fraction form
81,161.13/121,785.30 = 39,608.13/x - Step 3: Cross multiply
81,161.13x = 121,785.30 × 39,608.13 - Step 4: Simplify right side
81,161.13x = 4,823,687,994.49 - Step 5: Solve for x
x = 4,823,687,994.49/81,161.13 - Step 6: Final answer
x = 59,433.48
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.