Finding the Fourth Proportional to 139,912.47, 193,080.57 and 76,251.63
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Solution
The fourth proportional to 139,912.47, 193,080.57 and 76,251.63 is: 105,227.99
Step by Step Solution
- Step 1: Write the proportion equation
139,912.47 : 193,080.57 = 76,251.63 : x - Step 2: Convert to fraction form
139,912.47/193,080.57 = 76,251.63/x - Step 3: Cross multiply
139,912.47x = 193,080.57 × 76,251.63 - Step 4: Simplify right side
139,912.47x = 14,722,708,183.83 - Step 5: Solve for x
x = 14,722,708,183.83/139,912.47 - Step 6: Final answer
x = 105,227.99
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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.