Finding the Fourth Proportional to 81,120.08, 121,684.18 and 31,182.68
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Solution
The fourth proportional to 81,120.08, 121,684.18 and 31,182.68 is: 46,775.58
Step by Step Solution
- Step 1: Write the proportion equation
81,120.08 : 121,684.18 = 31,182.68 : x - Step 2: Convert to fraction form
81,120.08/121,684.18 = 31,182.68/x - Step 3: Cross multiply
81,120.08x = 121,684.18 × 31,182.68 - Step 4: Simplify right side
81,120.08x = 3,794,438,846.00 - Step 5: Solve for x
x = 3,794,438,846.00/81,120.08 - Step 6: Final answer
x = 46,775.58
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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.