Finding the Fourth Proportional to 138,904.24, 191,561.84 and 91,139.44
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Solution
The fourth proportional to 138,904.24, 191,561.84 and 91,139.44 is: 125,689.75
Step by Step Solution
- Step 1: Write the proportion equation
138,904.24 : 191,561.84 = 91,139.44 : x - Step 2: Convert to fraction form
138,904.24/191,561.84 = 91,139.44/x - Step 3: Cross multiply
138,904.24x = 191,561.84 × 91,139.44 - Step 4: Simplify right side
138,904.24x = 17,458,838,822.97 - Step 5: Solve for x
x = 17,458,838,822.97/138,904.24 - Step 6: Final answer
x = 125,689.75
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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.