Finding the Fourth Proportional to 128,419,962.70, 192,311,079.45 and 102,910,794.70
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Solution
The fourth proportional to 128,419,962.70, 192,311,079.45 and 102,910,794.70 is: 154,110,666.28
Step by Step Solution
- Step 1: Write the proportion equation
128,419,962.70 : 192,311,079.45 = 102,910,794.70 : x - Step 2: Convert to fraction form
128,419,962.70/192,311,079.45 = 102,910,794.70/x - Step 3: Cross multiply
128,419,962.70x = 192,311,079.45 × 102,910,794.70 - Step 4: Simplify right side
128,419,962.70x = 19,790,886,015,814,340 - Step 5: Solve for x
x = 19,790,886,015,814,340/128,419,962.70 - Step 6: Final answer
x = 154,110,666.28
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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.