Finding the Fourth Proportional to 129,623.70, 194,143.95 and 77,135.70
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Solution
The fourth proportional to 129,623.70, 194,143.95 and 77,135.70 is: 115,530.03
Step by Step Solution
- Step 1: Write the proportion equation
129,623.70 : 194,143.95 = 77,135.70 : x - Step 2: Convert to fraction form
129,623.70/194,143.95 = 77,135.70/x - Step 3: Cross multiply
129,623.70x = 194,143.95 × 77,135.70 - Step 4: Simplify right side
129,623.70x = 14,975,429,484.02 - Step 5: Solve for x
x = 14,975,429,484.02/129,623.70 - Step 6: Final answer
x = 115,530.03
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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.