Finding the Fourth Proportional to 86,218.40, 129,424.80 and 51,177.80
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Solution
The fourth proportional to 86,218.40, 129,424.80 and 51,177.80 is: 76,824.40
Step by Step Solution
- Step 1: Write the proportion equation
86,218.40 : 129,424.80 = 51,177.80 : x - Step 2: Convert to fraction form
86,218.40/129,424.80 = 51,177.80/x - Step 3: Cross multiply
86,218.40x = 129,424.80 × 51,177.80 - Step 4: Simplify right side
86,218.40x = 6,623,676,529.44 - Step 5: Solve for x
x = 6,623,676,529.44/86,218.40 - Step 6: Final answer
x = 76,824.40
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1.5x scale
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.