Finding the Fourth Proportional to 86,516.20, 129,774.30 and 85,349.80
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Solution
The fourth proportional to 86,516.20, 129,774.30 and 85,349.80 is: 128,024.70
Step by Step Solution
- Step 1: Write the proportion equation
86,516.20 : 129,774.30 = 85,349.80 : x - Step 2: Convert to fraction form
86,516.20/129,774.30 = 85,349.80/x - Step 3: Cross multiply
86,516.20x = 129,774.30 × 85,349.80 - Step 4: Simplify right side
86,516.20x = 11,076,210,550.14 - Step 5: Solve for x
x = 11,076,210,550.14/86,516.20 - Step 6: Final answer
x = 128,024.70
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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.