Finding the Fourth Proportional to 128,686.35, 193,055.04 and 39,936.08
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Solution
The fourth proportional to 128,686.35, 193,055.04 and 39,936.08 is: 59,912.03
Step by Step Solution
- Step 1: Write the proportion equation
128,686.35 : 193,055.04 = 39,936.08 : x - Step 2: Convert to fraction form
128,686.35/193,055.04 = 39,936.08/x - Step 3: Cross multiply
128,686.35x = 193,055.04 × 39,936.08 - Step 4: Simplify right side
128,686.35x = 7,709,860,556.57 - Step 5: Solve for x
x = 7,709,860,556.57/128,686.35 - Step 6: Final answer
x = 59,912.03
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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.