Finding the Fourth Proportional to 129,937.91, 179,312.94 and 76,212.63
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Solution
The fourth proportional to 129,937.91, 179,312.94 and 76,212.63 is: 105,172.63
Step by Step Solution
- Step 1: Write the proportion equation
129,937.91 : 179,312.94 = 76,212.63 : x - Step 2: Convert to fraction form
129,937.91/179,312.94 = 76,212.63/x - Step 3: Cross multiply
129,937.91x = 179,312.94 × 76,212.63 - Step 4: Simplify right side
129,937.91x = 13,665,910,750.43 - Step 5: Solve for x
x = 13,665,910,750.43/129,937.91 - Step 6: Final answer
x = 105,172.63
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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.