Finding the Fourth Proportional to 139,968,460.80, 209,952,691.20 and 126,363,571.20
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Solution
The fourth proportional to 139,968,460.80, 209,952,691.20 and 126,363,571.20 is: 189,545,356.80
Step by Step Solution
- Step 1: Write the proportion equation
139,968,460.80 : 209,952,691.20 = 126,363,571.20 : x - Step 2: Convert to fraction form
139,968,460.80/209,952,691.20 = 126,363,571.20/x - Step 3: Cross multiply
139,968,460.80x = 209,952,691.20 × 126,363,571.20 - Step 4: Simplify right side
139,968,460.80x = 26,530,371,843,082,812 - Step 5: Solve for x
x = 26,530,371,843,082,812/139,968,460.80 - Step 6: Final answer
x = 189,545,356.80
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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.