Finding the Fourth Proportional to 136,918.14, 188,944.95 and 76,489.65
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Solution
The fourth proportional to 136,918.14, 188,944.95 and 76,489.65 is: 105,554.55
Step by Step Solution
- Step 1: Write the proportion equation
136,918.14 : 188,944.95 = 76,489.65 : x - Step 2: Convert to fraction form
136,918.14/188,944.95 = 76,489.65/x - Step 3: Cross multiply
136,918.14x = 188,944.95 × 76,489.65 - Step 4: Simplify right side
136,918.14x = 14,452,333,094.77 - Step 5: Solve for x
x = 14,452,333,094.77/136,918.14 - Step 6: Final answer
x = 105,554.55
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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.