Finding the Fourth Proportional to 139,968,135.40, 209,952,203.10 and 128,882,669.80
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Solution
The fourth proportional to 139,968,135.40, 209,952,203.10 and 128,882,669.80 is: 193,324,004.70
Step by Step Solution
- Step 1: Write the proportion equation
139,968,135.40 : 209,952,203.10 = 128,882,669.80 : x - Step 2: Convert to fraction form
139,968,135.40/209,952,203.10 = 128,882,669.80/x - Step 3: Cross multiply
139,968,135.40x = 209,952,203.10 × 128,882,669.80 - Step 4: Simplify right side
139,968,135.40x = 27,059,200,465,919,836 - Step 5: Solve for x
x = 27,059,200,465,919,836/139,968,135.40 - Step 6: Final answer
x = 193,324,004.70
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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.