Finding the Fourth Proportional to 138,412.69, 191,009.49 and 74,750.48
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Solution
The fourth proportional to 138,412.69, 191,009.49 and 74,750.48 is: 103,155.65
Step by Step Solution
- Step 1: Write the proportion equation
138,412.69 : 191,009.49 = 74,750.48 : x - Step 2: Convert to fraction form
138,412.69/191,009.49 = 74,750.48/x - Step 3: Cross multiply
138,412.69x = 191,009.49 × 74,750.48 - Step 4: Simplify right side
138,412.69x = 14,278,051,062.06 - Step 5: Solve for x
x = 14,278,051,062.06/138,412.69 - Step 6: Final answer
x = 103,155.65
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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.