Finding the Fourth Proportional to 71,813.18, 107,719.70 and 19,221.28
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Solution
The fourth proportional to 71,813.18, 107,719.70 and 19,221.28 is: 28,831.90
Step by Step Solution
- Step 1: Write the proportion equation
71,813.18 : 107,719.70 = 19,221.28 : x - Step 2: Convert to fraction form
71,813.18/107,719.70 = 19,221.28/x - Step 3: Cross multiply
71,813.18x = 107,719.70 × 19,221.28 - Step 4: Simplify right side
71,813.18x = 2,070,510,515.22 - Step 5: Solve for x
x = 2,070,510,515.22/71,813.18 - Step 6: Final answer
x = 28,831.90
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.