Finding the Fourth Proportional to 128.48, 177.08 and 110.63
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Solution
The fourth proportional to 128.48, 177.08 and 110.63 is: 152.47
Step by Step Solution
- Step 1: Write the proportion equation
128.48 : 177.08 = 110.63 : x - Step 2: Convert to fraction form
128.48/177.08 = 110.63/x - Step 3: Cross multiply
128.48x = 177.08 × 110.63 - Step 4: Simplify right side
128.48x = 19,588.92 - Step 5: Solve for x
x = 19,588.92/128.48 - Step 6: Final answer
x = 152.47
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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.