Finding the Fourth Proportional to 93.58, 129.12 and 77.99
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Solution
The fourth proportional to 93.58, 129.12 and 77.99 is: 107.61
Step by Step Solution
- Step 1: Write the proportion equation
93.58 : 129.12 = 77.99 : x - Step 2: Convert to fraction form
93.58/129.12 = 77.99/x - Step 3: Cross multiply
93.58x = 129.12 × 77.99 - Step 4: Simplify right side
93.58x = 10,069.71 - Step 5: Solve for x
x = 10,069.71/93.58 - Step 6: Final answer
x = 107.61
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.