Finding the Fourth Proportional to 93.99, 140.81 and 72.31
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Solution
The fourth proportional to 93.99, 140.81 and 72.31 is: 108.32
Step by Step Solution
- Step 1: Write the proportion equation
93.99 : 140.81 = 72.31 : x - Step 2: Convert to fraction form
93.99/140.81 = 72.31/x - Step 3: Cross multiply
93.99x = 140.81 × 72.31 - Step 4: Simplify right side
93.99x = 10,181.52 - Step 5: Solve for x
x = 10,181.52/93.99 - Step 6: Final answer
x = 108.32
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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.