Finding the Fourth Proportional to 136,890.23, 188,906.53 and 76,461.74
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Solution
The fourth proportional to 136,890.23, 188,906.53 and 76,461.74 is: 105,516.08
Step by Step Solution
- Step 1: Write the proportion equation
136,890.23 : 188,906.53 = 76,461.74 : x - Step 2: Convert to fraction form
136,890.23/188,906.53 = 76,461.74/x - Step 3: Cross multiply
136,890.23x = 188,906.53 × 76,461.74 - Step 4: Simplify right side
136,890.23x = 14,444,120,654.32 - Step 5: Solve for x
x = 14,444,120,654.32/136,890.23 - Step 6: Final answer
x = 105,516.08
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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.