Finding the Fourth Proportional to 136,892.18, 188,909.21 and 76,463.67
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Solution
The fourth proportional to 136,892.18, 188,909.21 and 76,463.67 is: 105,518.75
Step by Step Solution
- Step 1: Write the proportion equation
136,892.18 : 188,909.21 = 76,463.67 : x - Step 2: Convert to fraction form
136,892.18/188,909.21 = 76,463.67/x - Step 3: Cross multiply
136,892.18x = 188,909.21 × 76,463.67 - Step 4: Simplify right side
136,892.18x = 14,444,691,111.08 - Step 5: Solve for x
x = 14,444,691,111.08/136,892.18 - Step 6: Final answer
x = 105,518.75
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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.