Finding the Fourth Proportional to 115,936.18, 159,987.36 and 65,635.18
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Solution
The fourth proportional to 115,936.18, 159,987.36 and 65,635.18 is: 90,573.96
Step by Step Solution
- Step 1: Write the proportion equation
115,936.18 : 159,987.36 = 65,635.18 : x - Step 2: Convert to fraction form
115,936.18/159,987.36 = 65,635.18/x - Step 3: Cross multiply
115,936.18x = 159,987.36 × 65,635.18 - Step 4: Simplify right side
115,936.18x = 10,500,799,171.32 - Step 5: Solve for x
x = 10,500,799,171.32/115,936.18 - Step 6: Final answer
x = 90,573.96
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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.