Finding the Fourth Proportional to 86,599.80, 129,899.70 and 84,007.80
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Solution
The fourth proportional to 86,599.80, 129,899.70 and 84,007.80 is: 126,011.70
Step by Step Solution
- Step 1: Write the proportion equation
86,599.80 : 129,899.70 = 84,007.80 : x - Step 2: Convert to fraction form
86,599.80/129,899.70 = 84,007.80/x - Step 3: Cross multiply
86,599.80x = 129,899.70 × 84,007.80 - Step 4: Simplify right side
86,599.80x = 10,912,588,017.66 - Step 5: Solve for x
x = 10,912,588,017.66/86,599.80 - Step 6: Final answer
x = 126,011.70
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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.