Finding the Fourth Proportional to 129.03, 178.12 and 79.93
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Solution
The fourth proportional to 129.03, 178.12 and 79.93 is: 110.34
Step by Step Solution
- Step 1: Write the proportion equation
129.03 : 178.12 = 79.93 : x - Step 2: Convert to fraction form
129.03/178.12 = 79.93/x - Step 3: Cross multiply
129.03x = 178.12 × 79.93 - Step 4: Simplify right side
129.03x = 14,237.13 - Step 5: Solve for x
x = 14,237.13/129.03 - Step 6: Final answer
x = 110.34
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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.