Finding the Fourth Proportional to 117.25, 161.59 and 86.09
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Solution
The fourth proportional to 117.25, 161.59 and 86.09 is: 118.65
Step by Step Solution
- Step 1: Write the proportion equation
117.25 : 161.59 = 86.09 : x - Step 2: Convert to fraction form
117.25/161.59 = 86.09/x - Step 3: Cross multiply
117.25x = 161.59 × 86.09 - Step 4: Simplify right side
117.25x = 13,911.28 - Step 5: Solve for x
x = 13,911.28/117.25 - Step 6: Final answer
x = 118.65
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.