Finding the Fourth Proportional to 102.99, 140.34 and 102.63
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Solution
The fourth proportional to 102.99, 140.34 and 102.63 is: 139.85
Step by Step Solution
- Step 1: Write the proportion equation
102.99 : 140.34 = 102.63 : x - Step 2: Convert to fraction form
102.99/140.34 = 102.63/x - Step 3: Cross multiply
102.99x = 140.34 × 102.63 - Step 4: Simplify right side
102.99x = 14,403.09 - Step 5: Solve for x
x = 14,403.09/102.99 - Step 6: Final answer
x = 139.85
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Why These Related Problems?
These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.