Finding the Fourth Proportional to 115,965.68, 160,028.16 and 65,664.80
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Solution
The fourth proportional to 115,965.68, 160,028.16 and 65,664.80 is: 90,614.89
Step by Step Solution
- Step 1: Write the proportion equation
115,965.68 : 160,028.16 = 65,664.80 : x - Step 2: Convert to fraction form
115,965.68/160,028.16 = 65,664.80/x - Step 3: Cross multiply
115,965.68x = 160,028.16 × 65,664.80 - Step 4: Simplify right side
115,965.68x = 10,508,217,120.77 - Step 5: Solve for x
x = 10,508,217,120.77/115,965.68 - Step 6: Final answer
x = 90,614.89
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1.5x scale
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.