Finding the Fourth Proportional to 138,409.31, 191,004.84 and 74,747.10
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Solution
The fourth proportional to 138,409.31, 191,004.84 and 74,747.10 is: 103,150.99
Step by Step Solution
- Step 1: Write the proportion equation
138,409.31 : 191,004.84 = 74,747.10 : x - Step 2: Convert to fraction form
138,409.31/191,004.84 = 74,747.10/x - Step 3: Cross multiply
138,409.31x = 191,004.84 × 74,747.10 - Step 4: Simplify right side
138,409.31x = 14,277,057,875.96 - Step 5: Solve for x
x = 14,277,057,875.96/138,409.31 - Step 6: Final answer
x = 103,150.99
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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.