Finding the Fourth Proportional to 128,309.32, 192,451.59 and 39,538.99
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Solution
The fourth proportional to 128,309.32, 192,451.59 and 39,538.99 is: 59,304.66
Step by Step Solution
- Step 1: Write the proportion equation
128,309.32 : 192,451.59 = 39,538.99 : x - Step 2: Convert to fraction form
128,309.32/192,451.59 = 39,538.99/x - Step 3: Cross multiply
128,309.32x = 192,451.59 × 39,538.99 - Step 4: Simplify right side
128,309.32x = 7,609,340,530.24 - Step 5: Solve for x
x = 7,609,340,530.24/128,309.32 - Step 6: Final answer
x = 59,304.66
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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.