Finding the Fourth Proportional to 208,117.14, 312,049.29 and 81,605.81
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Solution
The fourth proportional to 208,117.14, 312,049.29 and 81,605.81 is: 122,359.14
Step by Step Solution
- Step 1: Write the proportion equation
208,117.14 : 312,049.29 = 81,605.81 : x - Step 2: Convert to fraction form
208,117.14/312,049.29 = 81,605.81/x - Step 3: Cross multiply
208,117.14x = 312,049.29 × 81,605.81 - Step 4: Simplify right side
208,117.14x = 25,465,033,510.13 - Step 5: Solve for x
x = 25,465,033,510.13/208,117.14 - Step 6: Final answer
x = 122,359.14
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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.