Finding the Fourth Proportional to 136,927.80, 205,391.70 and 38,431.80
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Solution
The fourth proportional to 136,927.80, 205,391.70 and 38,431.80 is: 57,647.70
Step by Step Solution
- Step 1: Write the proportion equation
136,927.80 : 205,391.70 = 38,431.80 : x - Step 2: Convert to fraction form
136,927.80/205,391.70 = 38,431.80/x - Step 3: Cross multiply
136,927.80x = 205,391.70 × 38,431.80 - Step 4: Simplify right side
136,927.80x = 7,893,572,736.06 - Step 5: Solve for x
x = 7,893,572,736.06/136,927.80 - Step 6: Final answer
x = 57,647.70
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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.