Finding the Fourth Proportional to 81,629.22, 122,420.65 and 31,698.66
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Solution
The fourth proportional to 81,629.22, 122,420.65 and 31,698.66 is: 47,538.99
Step by Step Solution
- Step 1: Write the proportion equation
81,629.22 : 122,420.65 = 31,698.66 : x - Step 2: Convert to fraction form
81,629.22/122,420.65 = 31,698.66/x - Step 3: Cross multiply
81,629.22x = 122,420.65 × 31,698.66 - Step 4: Simplify right side
81,629.22x = 3,880,570,561.33 - Step 5: Solve for x
x = 3,880,570,561.33/81,629.22 - Step 6: Final answer
x = 47,538.99
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.