Finding the Fourth Proportional to 128,626.80, 177,514.40 and 77,652.08
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Solution
The fourth proportional to 128,626.80, 177,514.40 and 77,652.08 is: 107,165.55
Step by Step Solution
- Step 1: Write the proportion equation
128,626.80 : 177,514.40 = 77,652.08 : x - Step 2: Convert to fraction form
128,626.80/177,514.40 = 77,652.08/x - Step 3: Cross multiply
128,626.80x = 177,514.40 × 77,652.08 - Step 4: Simplify right side
128,626.80x = 13,784,362,389.95 - Step 5: Solve for x
x = 13,784,362,389.95/128,626.80 - Step 6: Final answer
x = 107,165.55
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.