Finding the Fourth Proportional to 100,217.97, 138,248.36 and 61,965.28
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Solution
The fourth proportional to 100,217.97, 138,248.36 and 61,965.28 is: 85,479.67
Step by Step Solution
- Step 1: Write the proportion equation
100,217.97 : 138,248.36 = 61,965.28 : x - Step 2: Convert to fraction form
100,217.97/138,248.36 = 61,965.28/x - Step 3: Cross multiply
100,217.97x = 138,248.36 × 61,965.28 - Step 4: Simplify right side
100,217.97x = 8,566,598,831.19 - Step 5: Solve for x
x = 8,566,598,831.19/100,217.97 - Step 6: Final answer
x = 85,479.67
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1.5x scale
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.