Finding the Fourth Proportional to 135,428.23, 186,828.92 and 87,696.95
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Solution
The fourth proportional to 135,428.23, 186,828.92 and 87,696.95 is: 120,981.62
Step by Step Solution
- Step 1: Write the proportion equation
135,428.23 : 186,828.92 = 87,696.95 : x - Step 2: Convert to fraction form
135,428.23/186,828.92 = 87,696.95/x - Step 3: Cross multiply
135,428.23x = 186,828.92 × 87,696.95 - Step 4: Simplify right side
135,428.23x = 16,384,326,017.31 - Step 5: Solve for x
x = 16,384,326,017.31/135,428.23 - Step 6: Final answer
x = 120,981.62
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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.