Finding the Fourth Proportional to 81,718.47, 112,761.18 and 47,718.99
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Solution
The fourth proportional to 81,718.47, 112,761.18 and 47,718.99 is: 65,846.19
Step by Step Solution
- Step 1: Write the proportion equation
81,718.47 : 112,761.18 = 47,718.99 : x - Step 2: Convert to fraction form
81,718.47/112,761.18 = 47,718.99/x - Step 3: Cross multiply
81,718.47x = 112,761.18 × 47,718.99 - Step 4: Simplify right side
81,718.47x = 5,380,849,620.81 - Step 5: Solve for x
x = 5,380,849,620.81/81,718.47 - Step 6: Final answer
x = 65,846.19
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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.