Finding the Fourth Proportional to 138,098.80, 206,629.80 and 91,442.80
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Solution
The fourth proportional to 138,098.80, 206,629.80 and 91,442.80 is: 136,820.94
Step by Step Solution
- Step 1: Write the proportion equation
138,098.80 : 206,629.80 = 91,442.80 : x - Step 2: Convert to fraction form
138,098.80/206,629.80 = 91,442.80/x - Step 3: Cross multiply
138,098.80x = 206,629.80 × 91,442.80 - Step 4: Simplify right side
138,098.80x = 18,894,807,475.44 - Step 5: Solve for x
x = 18,894,807,475.44/138,098.80 - Step 6: Final answer
x = 136,820.94
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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.