Finding the Fourth Proportional to 76,939.13, 115,407.49 and 39,477.58
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Solution
The fourth proportional to 76,939.13, 115,407.49 and 39,477.58 is: 59,215.75
Step by Step Solution
- Step 1: Write the proportion equation
76,939.13 : 115,407.49 = 39,477.58 : x - Step 2: Convert to fraction form
76,939.13/115,407.49 = 39,477.58/x - Step 3: Cross multiply
76,939.13x = 115,407.49 × 39,477.58 - Step 4: Simplify right side
76,939.13x = 4,556,008,419.07 - Step 5: Solve for x
x = 4,556,008,419.07/76,939.13 - Step 6: Final answer
x = 59,215.75
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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.