Finding the Fourth Proportional to 128,705,121.40, 193,057,682.10 and 68,238,945.40
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Solution
The fourth proportional to 128,705,121.40, 193,057,682.10 and 68,238,945.40 is: 102,358,418.10
Step by Step Solution
- Step 1: Write the proportion equation
128,705,121.40 : 193,057,682.10 = 68,238,945.40 : x - Step 2: Convert to fraction form
128,705,121.40/193,057,682.10 = 68,238,945.40/x - Step 3: Cross multiply
128,705,121.40x = 193,057,682.10 × 68,238,945.40 - Step 4: Simplify right side
128,705,121.40x = 13,174,052,627,872,458 - Step 5: Solve for x
x = 13,174,052,627,872,458/128,705,121.40 - Step 6: Final answer
x = 102,358,418.10
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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.