Finding the Fourth Proportional to 159.99, 239.99 and 87.99
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Solution
The fourth proportional to 159.99, 239.99 and 87.99 is: 131.99
Step by Step Solution
- Step 1: Write the proportion equation
159.99 : 239.99 = 87.99 : x - Step 2: Convert to fraction form
159.99/239.99 = 87.99/x - Step 3: Cross multiply
159.99x = 239.99 × 87.99 - Step 4: Simplify right side
159.99x = 21,116.72 - Step 5: Solve for x
x = 21,116.72/159.99 - Step 6: Final answer
x = 131.99
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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.