Finding the Fourth Proportional to 100,521.74, 138,727.07 and 66,471.06
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Solution
The fourth proportional to 100,521.74, 138,727.07 and 66,471.06 is: 91,734.74
Step by Step Solution
- Step 1: Write the proportion equation
100,521.74 : 138,727.07 = 66,471.06 : x - Step 2: Convert to fraction form
100,521.74/138,727.07 = 66,471.06/x - Step 3: Cross multiply
100,521.74x = 138,727.07 × 66,471.06 - Step 4: Simplify right side
100,521.74x = 9,221,335,061.24 - Step 5: Solve for x
x = 9,221,335,061.24/100,521.74 - Step 6: Final answer
x = 91,734.74
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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.