Finding the Fourth Proportional to 139,968,122.70, 209,952,184.05 and 128,914,149.90
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Solution
The fourth proportional to 139,968,122.70, 209,952,184.05 and 128,914,149.90 is: 193,371,224.85
Step by Step Solution
- Step 1: Write the proportion equation
139,968,122.70 : 209,952,184.05 = 128,914,149.90 : x - Step 2: Convert to fraction form
139,968,122.70/209,952,184.05 = 128,914,149.90/x - Step 3: Cross multiply
139,968,122.70x = 209,952,184.05 × 128,914,149.90 - Step 4: Simplify right side
139,968,122.70x = 27,065,807,326,454,092 - Step 5: Solve for x
x = 27,065,807,326,454,092/139,968,122.70 - Step 6: Final answer
x = 193,371,224.85
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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.