Finding the Fourth Proportional to 139,969,231.80, 209,953,847.70 and 68,305,615.80
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Solution
The fourth proportional to 139,969,231.80, 209,953,847.70 and 68,305,615.80 is: 102,458,423.70
Step by Step Solution
- Step 1: Write the proportion equation
139,969,231.80 : 209,953,847.70 = 68,305,615.80 : x - Step 2: Convert to fraction form
139,969,231.80/209,953,847.70 = 68,305,615.80/x - Step 3: Cross multiply
139,969,231.80x = 209,953,847.70 × 68,305,615.80 - Step 4: Simplify right side
139,969,231.80x = 14,341,026,856,727,912 - Step 5: Solve for x
x = 14,341,026,856,727,912/139,969,231.80 - Step 6: Final answer
x = 102,458,423.70
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1.5x scale
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.