Finding the Fourth Proportional to 86,738.40, 129,905.50 and 84,344.14
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Solution
The fourth proportional to 86,738.40, 129,905.50 and 84,344.14 is: 126,319.70
Step by Step Solution
- Step 1: Write the proportion equation
86,738.40 : 129,905.50 = 84,344.14 : x - Step 2: Convert to fraction form
86,738.40/129,905.50 = 84,344.14/x - Step 3: Cross multiply
86,738.40x = 129,905.50 × 84,344.14 - Step 4: Simplify right side
86,738.40x = 10,956,767,946.58 - Step 5: Solve for x
x = 10,956,767,946.58/86,738.40 - Step 6: Final answer
x = 126,319.70
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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.