Finding the Fourth Proportional to 128,776,381.20, 193,160,139.48 and 36,660,689.64
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Solution
The fourth proportional to 128,776,381.20, 193,160,139.48 and 36,660,689.64 is: 54,989,772.65
Step by Step Solution
- Step 1: Write the proportion equation
128,776,381.20 : 193,160,139.48 = 36,660,689.64 : x - Step 2: Convert to fraction form
128,776,381.20/193,160,139.48 = 36,660,689.64/x - Step 3: Cross multiply
128,776,381.20x = 193,160,139.48 × 36,660,689.64 - Step 4: Simplify right side
128,776,381.20x = 7,081,383,924,295,391 - Step 5: Solve for x
x = 7,081,383,924,295,391/128,776,381.20 - Step 6: Final answer
x = 54,989,772.65
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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.