Finding the Fourth Proportional to 86,817.70, 130,226.55 and 76,449.70
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Solution
The fourth proportional to 86,817.70, 130,226.55 and 76,449.70 is: 114,674.55
Step by Step Solution
- Step 1: Write the proportion equation
86,817.70 : 130,226.55 = 76,449.70 : x - Step 2: Convert to fraction form
86,817.70/130,226.55 = 76,449.70/x - Step 3: Cross multiply
86,817.70x = 130,226.55 × 76,449.70 - Step 4: Simplify right side
86,817.70x = 9,955,780,679.54 - Step 5: Solve for x
x = 9,955,780,679.54/86,817.70 - Step 6: Final answer
x = 114,674.55
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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.