Finding the Fourth Proportional to 101.99, 152.60 and 78.99
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Solution
The fourth proportional to 101.99, 152.60 and 78.99 is: 118.18
Step by Step Solution
- Step 1: Write the proportion equation
101.99 : 152.60 = 78.99 : x - Step 2: Convert to fraction form
101.99/152.60 = 78.99/x - Step 3: Cross multiply
101.99x = 152.60 × 78.99 - Step 4: Simplify right side
101.99x = 12,053.48 - Step 5: Solve for x
x = 12,053.48/101.99 - Step 6: Final answer
x = 118.18
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.