Finding the Fourth Proportional to 129,675.84, 178,863.84 and 79,399.68
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Solution
The fourth proportional to 129,675.84, 178,863.84 and 79,399.68 is: 109,517.17
Step by Step Solution
- Step 1: Write the proportion equation
129,675.84 : 178,863.84 = 79,399.68 : x - Step 2: Convert to fraction form
129,675.84/178,863.84 = 79,399.68/x - Step 3: Cross multiply
129,675.84x = 178,863.84 × 79,399.68 - Step 4: Simplify right side
129,675.84x = 14,201,731,659.57 - Step 5: Solve for x
x = 14,201,731,659.57/129,675.84 - Step 6: Final answer
x = 109,517.17
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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.