Finding the Fourth Proportional to 138,655.13, 191,345.13 and 81,295.92
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Solution
The fourth proportional to 138,655.13, 191,345.13 and 81,295.92 is: 112,188.99
Step by Step Solution
- Step 1: Write the proportion equation
138,655.13 : 191,345.13 = 81,295.92 : x - Step 2: Convert to fraction form
138,655.13/191,345.13 = 81,295.92/x - Step 3: Cross multiply
138,655.13x = 191,345.13 × 81,295.92 - Step 4: Simplify right side
138,655.13x = 15,555,578,380.87 - Step 5: Solve for x
x = 15,555,578,380.87/138,655.13 - Step 6: Final answer
x = 112,188.99
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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.