Finding the Fourth Proportional to 205,165.30, 307,638.60 and 86,702.80
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Solution
The fourth proportional to 205,165.30, 307,638.60 and 86,702.80 is: 130,007.99
Step by Step Solution
- Step 1: Write the proportion equation
205,165.30 : 307,638.60 = 86,702.80 : x - Step 2: Convert to fraction form
205,165.30/307,638.60 = 86,702.80/x - Step 3: Cross multiply
205,165.30x = 307,638.60 × 86,702.80 - Step 4: Simplify right side
205,165.30x = 26,673,128,008.08 - Step 5: Solve for x
x = 26,673,128,008.08/205,165.30 - Step 6: Final answer
x = 130,007.99
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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.