Finding the Fourth Proportional to 138,653.79, 191,343.11 and 74,991.44
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Solution
The fourth proportional to 138,653.79, 191,343.11 and 74,991.44 is: 103,488.65
Step by Step Solution
- Step 1: Write the proportion equation
138,653.79 : 191,343.11 = 74,991.44 : x - Step 2: Convert to fraction form
138,653.79/191,343.11 = 74,991.44/x - Step 3: Cross multiply
138,653.79x = 191,343.11 × 74,991.44 - Step 4: Simplify right side
138,653.79x = 14,349,094,021.31 - Step 5: Solve for x
x = 14,349,094,021.31/138,653.79 - Step 6: Final answer
x = 103,488.65
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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.