Finding the Fourth Proportional to 86,775.40, 130,163.10 and 85,853.80
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Solution
The fourth proportional to 86,775.40, 130,163.10 and 85,853.80 is: 128,780.70
Step by Step Solution
- Step 1: Write the proportion equation
86,775.40 : 130,163.10 = 85,853.80 : x - Step 2: Convert to fraction form
86,775.40/130,163.10 = 85,853.80/x - Step 3: Cross multiply
86,775.40x = 130,163.10 × 85,853.80 - Step 4: Simplify right side
86,775.40x = 11,174,996,754.78 - Step 5: Solve for x
x = 11,174,996,754.78/86,775.40 - Step 6: Final answer
x = 128,780.70
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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.