Finding the Fourth Proportional to 258,486.18, 387,729.47 and 81,006.97
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Solution
The fourth proportional to 258,486.18, 387,729.47 and 81,006.97 is: 121,510.52
Step by Step Solution
- Step 1: Write the proportion equation
258,486.18 : 387,729.47 = 81,006.97 : x - Step 2: Convert to fraction form
258,486.18/387,729.47 = 81,006.97/x - Step 3: Cross multiply
258,486.18x = 387,729.47 × 81,006.97 - Step 4: Simplify right side
258,486.18x = 31,408,789,544.41 - Step 5: Solve for x
x = 31,408,789,544.41/258,486.18 - Step 6: Final answer
x = 121,510.52
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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.