Finding the Fourth Proportional to 81,164.24, 121,721.40 and 31,240.40
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Solution
The fourth proportional to 81,164.24, 121,721.40 and 31,240.40 is: 46,850.99
Step by Step Solution
- Step 1: Write the proportion equation
81,164.24 : 121,721.40 = 31,240.40 : x - Step 2: Convert to fraction form
81,164.24/121,721.40 = 31,240.40/x - Step 3: Cross multiply
81,164.24x = 121,721.40 × 31,240.40 - Step 4: Simplify right side
81,164.24x = 3,802,625,224.56 - Step 5: Solve for x
x = 3,802,625,224.56/81,164.24 - Step 6: Final answer
x = 46,850.99
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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.