Finding the Fourth Proportional to 139,906.31, 193,070.70 and 76,244.09
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Solution
The fourth proportional to 139,906.31, 193,070.70 and 76,244.09 is: 105,216.84
Step by Step Solution
- Step 1: Write the proportion equation
139,906.31 : 193,070.70 = 76,244.09 : x - Step 2: Convert to fraction form
139,906.31/193,070.70 = 76,244.09/x - Step 3: Cross multiply
139,906.31x = 193,070.70 × 76,244.09 - Step 4: Simplify right side
139,906.31x = 14,720,498,861.81 - Step 5: Solve for x
x = 14,720,498,861.81/139,906.31 - Step 6: Final answer
x = 105,216.84
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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.