Finding the Fourth Proportional to 136,930.18, 188,929.10 and 80,330.62
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Solution
The fourth proportional to 136,930.18, 188,929.10 and 80,330.62 is: 110,835.99
Step by Step Solution
- Step 1: Write the proportion equation
136,930.18 : 188,929.10 = 80,330.62 : x - Step 2: Convert to fraction form
136,930.18/188,929.10 = 80,330.62/x - Step 3: Cross multiply
136,930.18x = 188,929.10 × 80,330.62 - Step 4: Simplify right side
136,930.18x = 15,176,791,739.04 - Step 5: Solve for x
x = 15,176,791,739.04/136,930.18 - Step 6: Final answer
x = 110,835.99
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1.5x scale
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.