Finding the Fourth Proportional to 138,648.81, 191,335.41 and 74,986.62
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Solution
The fourth proportional to 138,648.81, 191,335.41 and 74,986.62 is: 103,481.56
Step by Step Solution
- Step 1: Write the proportion equation
138,648.81 : 191,335.41 = 74,986.62 : x - Step 2: Convert to fraction form
138,648.81/191,335.41 = 74,986.62/x - Step 3: Cross multiply
138,648.81x = 191,335.41 × 74,986.62 - Step 4: Simplify right side
138,648.81x = 14,347,595,682.21 - Step 5: Solve for x
x = 14,347,595,682.21/138,648.81 - Step 6: Final answer
x = 103,481.56
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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.