Finding the Fourth Proportional to 139,378,220.30, 209,053,707.87 and 42,334,770.62
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Solution
The fourth proportional to 139,378,220.30, 209,053,707.87 and 42,334,770.62 is: 63,498,018.21
Step by Step Solution
- Step 1: Write the proportion equation
139,378,220.30 : 209,053,707.87 = 42,334,770.62 : x - Step 2: Convert to fraction form
139,378,220.30/209,053,707.87 = 42,334,770.62/x - Step 3: Cross multiply
139,378,220.30x = 209,053,707.87 × 42,334,770.62 - Step 4: Simplify right side
139,378,220.30x = 8,850,240,770,618,329 - Step 5: Solve for x
x = 8,850,240,770,618,329/139,378,220.30 - Step 6: Final answer
x = 63,498,018.21
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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.