Finding the Fourth Proportional to 74,979.48, 103,329.36 and 53,721.84
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Solution
The fourth proportional to 74,979.48, 103,329.36 and 53,721.84 is: 74,034.17
Step by Step Solution
- Step 1: Write the proportion equation
74,979.48 : 103,329.36 = 53,721.84 : x - Step 2: Convert to fraction form
74,979.48/103,329.36 = 53,721.84/x - Step 3: Cross multiply
74,979.48x = 103,329.36 × 53,721.84 - Step 4: Simplify right side
74,979.48x = 5,551,043,345.22 - Step 5: Solve for x
x = 5,551,043,345.22/74,979.48 - Step 6: Final answer
x = 74,034.17
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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.