Finding the Fourth Proportional to 138,456.19, 191,069.54 and 74,793.99
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Solution
The fourth proportional to 138,456.19, 191,069.54 and 74,793.99 is: 103,215.71
Step by Step Solution
- Step 1: Write the proportion equation
138,456.19 : 191,069.54 = 74,793.99 : x - Step 2: Convert to fraction form
138,456.19/191,069.54 = 74,793.99/x - Step 3: Cross multiply
138,456.19x = 191,069.54 × 74,793.99 - Step 4: Simplify right side
138,456.19x = 14,290,853,451.05 - Step 5: Solve for x
x = 14,290,853,451.05/138,456.19 - Step 6: Final answer
x = 103,215.71
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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.