Finding the Fourth Proportional to 128,371.05, 192,557.12 and 84,276.81
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Solution
The fourth proportional to 128,371.05, 192,557.12 and 84,276.81 is: 126,415.57
Step by Step Solution
- Step 1: Write the proportion equation
128,371.05 : 192,557.12 = 84,276.81 : x - Step 2: Convert to fraction form
128,371.05/192,557.12 = 84,276.81/x - Step 3: Cross multiply
128,371.05x = 192,557.12 × 84,276.81 - Step 4: Simplify right side
128,371.05x = 16,228,099,816.39 - Step 5: Solve for x
x = 16,228,099,816.39/128,371.05 - Step 6: Final answer
x = 126,415.57
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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.