Finding the Fourth Proportional to 113.79, 157.08 and 86.23
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Solution
The fourth proportional to 113.79, 157.08 and 86.23 is: 119.03
Step by Step Solution
- Step 1: Write the proportion equation
113.79 : 157.08 = 86.23 : x - Step 2: Convert to fraction form
113.79/157.08 = 86.23/x - Step 3: Cross multiply
113.79x = 157.08 × 86.23 - Step 4: Simplify right side
113.79x = 13,544.26 - Step 5: Solve for x
x = 13,544.26/113.79 - Step 6: Final answer
x = 119.03
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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.