Finding the Fourth Proportional to 138,451.30, 191,062.68 and 74,789.08
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Solution
The fourth proportional to 138,451.30, 191,062.68 and 74,789.08 is: 103,208.87
Step by Step Solution
- Step 1: Write the proportion equation
138,451.30 : 191,062.68 = 74,789.08 : x - Step 2: Convert to fraction form
138,451.30/191,062.68 = 74,789.08/x - Step 3: Cross multiply
138,451.30x = 191,062.68 × 74,789.08 - Step 4: Simplify right side
138,451.30x = 14,289,402,059.53 - Step 5: Solve for x
x = 14,289,402,059.53/138,451.30 - Step 6: Final answer
x = 103,208.87
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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.