Finding the Fourth Proportional to 128,311.36, 192,368.93 and 77,699.38
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Solution
The fourth proportional to 128,311.36, 192,368.93 and 77,699.38 is: 116,489.66
Step by Step Solution
- Step 1: Write the proportion equation
128,311.36 : 192,368.93 = 77,699.38 : x - Step 2: Convert to fraction form
128,311.36/192,368.93 = 77,699.38/x - Step 3: Cross multiply
128,311.36x = 192,368.93 × 77,699.38 - Step 4: Simplify right side
128,311.36x = 14,946,946,592.26 - Step 5: Solve for x
x = 14,946,946,592.26/128,311.36 - Step 6: Final answer
x = 116,489.66
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1.5x scale
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.