Finding the Fourth Proportional to 113.99, 171.07 and 86.99
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Solution
The fourth proportional to 113.99, 171.07 and 86.99 is: 130.55
Step by Step Solution
- Step 1: Write the proportion equation
113.99 : 171.07 = 86.99 : x - Step 2: Convert to fraction form
113.99/171.07 = 86.99/x - Step 3: Cross multiply
113.99x = 171.07 × 86.99 - Step 4: Simplify right side
113.99x = 14,881.59 - Step 5: Solve for x
x = 14,881.59/113.99 - Step 6: Final answer
x = 130.55
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.