Finding the Fourth Proportional to 138,674.84, 191,310.50 and 81,285.07
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Solution
The fourth proportional to 138,674.84, 191,310.50 and 81,285.07 is: 112,137.77
Step by Step Solution
- Step 1: Write the proportion equation
138,674.84 : 191,310.50 = 81,285.07 : x - Step 2: Convert to fraction form
138,674.84/191,310.50 = 81,285.07/x - Step 3: Cross multiply
138,674.84x = 191,310.50 × 81,285.07 - Step 4: Simplify right side
138,674.84x = 15,550,687,384.24 - Step 5: Solve for x
x = 15,550,687,384.24/138,674.84 - Step 6: Final answer
x = 112,137.77
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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.