Finding the Fourth Proportional to 128,135.20, 192,202.80 and 92,705.80
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Solution
The fourth proportional to 128,135.20, 192,202.80 and 92,705.80 is: 139,058.70
Step by Step Solution
- Step 1: Write the proportion equation
128,135.20 : 192,202.80 = 92,705.80 : x - Step 2: Convert to fraction form
128,135.20/192,202.80 = 92,705.80/x - Step 3: Cross multiply
128,135.20x = 192,202.80 × 92,705.80 - Step 4: Simplify right side
128,135.20x = 17,818,314,336.24 - Step 5: Solve for x
x = 17,818,314,336.24/128,135.20 - Step 6: Final answer
x = 139,058.70
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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.