Finding the Fourth Proportional to 87,207.40, 130,811.10 and 86,285.80
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Solution
The fourth proportional to 87,207.40, 130,811.10 and 86,285.80 is: 129,428.70
Step by Step Solution
- Step 1: Write the proportion equation
87,207.40 : 130,811.10 = 86,285.80 : x - Step 2: Convert to fraction form
87,207.40/130,811.10 = 86,285.80/x - Step 3: Cross multiply
87,207.40x = 130,811.10 × 86,285.80 - Step 4: Simplify right side
87,207.40x = 11,287,140,412.38 - Step 5: Solve for x
x = 11,287,140,412.38/87,207.40 - Step 6: Final answer
x = 129,428.70
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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.