Finding the Fourth Proportional to 86,549.36, 129,778.80 and 39,123.68
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Solution
The fourth proportional to 86,549.36, 129,778.80 and 39,123.68 is: 58,665.07
Step by Step Solution
- Step 1: Write the proportion equation
86,549.36 : 129,778.80 = 39,123.68 : x - Step 2: Convert to fraction form
86,549.36/129,778.80 = 39,123.68/x - Step 3: Cross multiply
86,549.36x = 129,778.80 × 39,123.68 - Step 4: Simplify right side
86,549.36x = 5,077,424,241.98 - Step 5: Solve for x
x = 5,077,424,241.98/86,549.36 - Step 6: Final answer
x = 58,665.07
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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.