Finding the Fourth Proportional to 128,046.20, 176,720.47 and 71,469.32
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Solution
The fourth proportional to 128,046.20, 176,720.47 and 71,469.32 is: 98,636.99
Step by Step Solution
- Step 1: Write the proportion equation
128,046.20 : 176,720.47 = 71,469.32 : x - Step 2: Convert to fraction form
128,046.20/176,720.47 = 71,469.32/x - Step 3: Cross multiply
128,046.20x = 176,720.47 × 71,469.32 - Step 4: Simplify right side
128,046.20x = 12,630,090,758.70 - Step 5: Solve for x
x = 12,630,090,758.70/128,046.20 - Step 6: Final answer
x = 98,636.99
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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.