Finding the Fourth Proportional to 81,978.41, 113,129.97 and 47,993.24
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Solution
The fourth proportional to 81,978.41, 113,129.97 and 47,993.24 is: 66,230.53
Step by Step Solution
- Step 1: Write the proportion equation
81,978.41 : 113,129.97 = 47,993.24 : x - Step 2: Convert to fraction form
81,978.41/113,129.97 = 47,993.24/x - Step 3: Cross multiply
81,978.41x = 113,129.97 × 47,993.24 - Step 4: Simplify right side
81,978.41x = 5,429,473,904.25 - Step 5: Solve for x
x = 5,429,473,904.25/81,978.41 - Step 6: Final answer
x = 66,230.53
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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.