Finding the Fourth Proportional to 136,918.11, 188,946.97 and 76,488.74
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Solution
The fourth proportional to 136,918.11, 188,946.97 and 76,488.74 is: 105,554.45
Step by Step Solution
- Step 1: Write the proportion equation
136,918.11 : 188,946.97 = 76,488.74 : x - Step 2: Convert to fraction form
136,918.11/188,946.97 = 76,488.74/x - Step 3: Cross multiply
136,918.11x = 188,946.97 × 76,488.74 - Step 4: Simplify right side
136,918.11x = 14,452,315,662.12 - Step 5: Solve for x
x = 14,452,315,662.12/136,918.11 - Step 6: Final answer
x = 105,554.45
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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.