Finding the Fourth Proportional to 135,979.20, 187,624.80 and 79,392.96
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Solution
The fourth proportional to 135,979.20, 187,624.80 and 79,392.96 is: 109,546.81
Step by Step Solution
- Step 1: Write the proportion equation
135,979.20 : 187,624.80 = 79,392.96 : x - Step 2: Convert to fraction form
135,979.20/187,624.80 = 79,392.96/x - Step 3: Cross multiply
135,979.20x = 187,624.80 × 79,392.96 - Step 4: Simplify right side
135,979.20x = 14,896,088,241.41 - Step 5: Solve for x
x = 14,896,088,241.41/135,979.20 - Step 6: Final answer
x = 109,546.81
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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.