Finding the Fourth Proportional to 139,979.54, 193,163.44 and 79,541.79
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Solution
The fourth proportional to 139,979.54, 193,163.44 and 79,541.79 is: 109,762.95
Step by Step Solution
- Step 1: Write the proportion equation
139,979.54 : 193,163.44 = 79,541.79 : x - Step 2: Convert to fraction form
139,979.54/193,163.44 = 79,541.79/x - Step 3: Cross multiply
139,979.54x = 193,163.44 × 79,541.79 - Step 4: Simplify right side
139,979.54x = 15,364,566,420.19 - Step 5: Solve for x
x = 15,364,566,420.19/139,979.54 - Step 6: Final answer
x = 109,762.95
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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.