Finding the Fourth Proportional to 136,881.84, 188,883.60 and 76,447.68
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Solution
The fourth proportional to 136,881.84, 188,883.60 and 76,447.68 is: 105,490.35
Step by Step Solution
- Step 1: Write the proportion equation
136,881.84 : 188,883.60 = 76,447.68 : x - Step 2: Convert to fraction form
136,881.84/188,883.60 = 76,447.68/x - Step 3: Cross multiply
136,881.84x = 188,883.60 × 76,447.68 - Step 4: Simplify right side
136,881.84x = 14,439,713,010.05 - Step 5: Solve for x
x = 14,439,713,010.05/136,881.84 - Step 6: Final answer
x = 105,490.35
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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.