Finding the Fourth Proportional to 128,813.04, 177,745.08 and 71,451.72
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Solution
The fourth proportional to 128,813.04, 177,745.08 and 71,451.72 is: 98,593.99
Step by Step Solution
- Step 1: Write the proportion equation
128,813.04 : 177,745.08 = 71,451.72 : x - Step 2: Convert to fraction form
128,813.04/177,745.08 = 71,451.72/x - Step 3: Cross multiply
128,813.04x = 177,745.08 × 71,451.72 - Step 4: Simplify right side
128,813.04x = 12,700,191,687.54 - Step 5: Solve for x
x = 12,700,191,687.54/128,813.04 - Step 6: Final answer
x = 98,593.99
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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.