Finding the Fourth Proportional to 86,579.42, 129,882.11 and 30,409.63
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Solution
The fourth proportional to 86,579.42, 129,882.11 and 30,409.63 is: 45,619.00
Step by Step Solution
- Step 1: Write the proportion equation
86,579.42 : 129,882.11 = 30,409.63 : x - Step 2: Convert to fraction form
86,579.42/129,882.11 = 30,409.63/x - Step 3: Cross multiply
86,579.42x = 129,882.11 × 30,409.63 - Step 4: Simplify right side
86,579.42x = 3,949,666,259.31 - Step 5: Solve for x
x = 3,949,666,259.31/86,579.42 - Step 6: Final answer
x = 45,619.00
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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.