Finding the Fourth Proportional to 138,406.88, 191,001.48 and 74,744.68
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Solution
The fourth proportional to 138,406.88, 191,001.48 and 74,744.68 is: 103,147.65
Step by Step Solution
- Step 1: Write the proportion equation
138,406.88 : 191,001.48 = 74,744.68 : x - Step 2: Convert to fraction form
138,406.88/191,001.48 = 74,744.68/x - Step 3: Cross multiply
138,406.88x = 191,001.48 × 74,744.68 - Step 4: Simplify right side
138,406.88x = 14,276,344,502.13 - Step 5: Solve for x
x = 14,276,344,502.13/138,406.88 - Step 6: Final answer
x = 103,147.65
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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.