Finding the Fourth Proportional to 128,936.39, 193,341.02 and 53,021.08
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Solution
The fourth proportional to 128,936.39, 193,341.02 and 53,021.08 is: 79,505.47
Step by Step Solution
- Step 1: Write the proportion equation
128,936.39 : 193,341.02 = 53,021.08 : x - Step 2: Convert to fraction form
128,936.39/193,341.02 = 53,021.08/x - Step 3: Cross multiply
128,936.39x = 193,341.02 × 53,021.08 - Step 4: Simplify right side
128,936.39x = 10,251,148,722.00 - Step 5: Solve for x
x = 10,251,148,722.00/128,936.39 - Step 6: Final answer
x = 79,505.47
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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.