Finding the Fourth Proportional to 128,021.73, 176,691.56 and 74,351.67
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Solution
The fourth proportional to 128,021.73, 176,691.56 and 74,351.67 is: 102,617.83
Step by Step Solution
- Step 1: Write the proportion equation
128,021.73 : 176,691.56 = 74,351.67 : x - Step 2: Convert to fraction form
128,021.73/176,691.56 = 74,351.67/x - Step 3: Cross multiply
128,021.73x = 176,691.56 × 74,351.67 - Step 4: Simplify right side
128,021.73x = 13,137,312,189.15 - Step 5: Solve for x
x = 13,137,312,189.15/128,021.73 - Step 6: Final answer
x = 102,617.83
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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.