Finding the Fourth Proportional to 128,781,724.20, 193,396,535.10 and 68,315,548.20
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Solution
The fourth proportional to 128,781,724.20, 193,396,535.10 and 68,315,548.20 is: 102,592,121.65
Step by Step Solution
- Step 1: Write the proportion equation
128,781,724.20 : 193,396,535.10 = 68,315,548.20 : x - Step 2: Convert to fraction form
128,781,724.20/193,396,535.10 = 68,315,548.20/x - Step 3: Cross multiply
128,781,724.20x = 193,396,535.10 × 68,315,548.20 - Step 4: Simplify right side
128,781,724.20x = 13,211,990,315,337,042 - Step 5: Solve for x
x = 13,211,990,315,337,042/128,781,724.20 - Step 6: Final answer
x = 102,592,121.65
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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.