Finding the Fourth Proportional to 138,825.18, 191,582.67 and 78,404.91
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Solution
The fourth proportional to 138,825.18, 191,582.67 and 78,404.91 is: 108,200.99
Step by Step Solution
- Step 1: Write the proportion equation
138,825.18 : 191,582.67 = 78,404.91 : x - Step 2: Convert to fraction form
138,825.18/191,582.67 = 78,404.91/x - Step 3: Cross multiply
138,825.18x = 191,582.67 × 78,404.91 - Step 4: Simplify right side
138,825.18x = 15,021,021,998.91 - Step 5: Solve for x
x = 15,021,021,998.91/138,825.18 - Step 6: Final answer
x = 108,200.99
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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.