Finding the Fourth Proportional to 86,517.60, 129,970.80 and 83,212.80
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Solution
The fourth proportional to 86,517.60, 129,970.80 and 83,212.80 is: 125,006.17
Step by Step Solution
- Step 1: Write the proportion equation
86,517.60 : 129,970.80 = 83,212.80 : x - Step 2: Convert to fraction form
86,517.60/129,970.80 = 83,212.80/x - Step 3: Cross multiply
86,517.60x = 129,970.80 × 83,212.80 - Step 4: Simplify right side
86,517.60x = 10,815,234,186.24 - Step 5: Solve for x
x = 10,815,234,186.24/86,517.60 - Step 6: Final answer
x = 125,006.17
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1.5x scale
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.