Finding the Fourth Proportional to 97,855.20, 135,043.20 and 55,412.80
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Solution
The fourth proportional to 97,855.20, 135,043.20 and 55,412.80 is: 76,471.38
Step by Step Solution
- Step 1: Write the proportion equation
97,855.20 : 135,043.20 = 55,412.80 : x - Step 2: Convert to fraction form
97,855.20/135,043.20 = 55,412.80/x - Step 3: Cross multiply
97,855.20x = 135,043.20 × 55,412.80 - Step 4: Simplify right side
97,855.20x = 7,483,121,832.96 - Step 5: Solve for x
x = 7,483,121,832.96/97,855.20 - Step 6: Final answer
x = 76,471.38
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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.