Finding the Fourth Proportional to 138,149,966.88, 190,732,993.38 and 87,942,514.38
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Solution
The fourth proportional to 138,149,966.88, 190,732,993.38 and 87,942,514.38 is: 121,415,439.99
Step by Step Solution
- Step 1: Write the proportion equation
138,149,966.88 : 190,732,993.38 = 87,942,514.38 : x - Step 2: Convert to fraction form
138,149,966.88/190,732,993.38 = 87,942,514.38/x - Step 3: Cross multiply
138,149,966.88x = 190,732,993.38 × 87,942,514.38 - Step 4: Simplify right side
138,149,966.88x = 16,773,539,013,061,094 - Step 5: Solve for x
x = 16,773,539,013,061,094/138,149,966.88 - Step 6: Final answer
x = 121,415,439.99
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.