Finding the Fourth Proportional to 128.79, 177.85 and 95.99
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Solution
The fourth proportional to 128.79, 177.85 and 95.99 is: 132.55
Step by Step Solution
- Step 1: Write the proportion equation
128.79 : 177.85 = 95.99 : x - Step 2: Convert to fraction form
128.79/177.85 = 95.99/x - Step 3: Cross multiply
128.79x = 177.85 × 95.99 - Step 4: Simplify right side
128.79x = 17,070.51 - Step 5: Solve for x
x = 17,070.51/128.79 - Step 6: Final answer
x = 132.55
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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.