Finding the Fourth Proportional to 128,737.76, 177,621.30 and 74,285.64
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Solution
The fourth proportional to 128,737.76, 177,621.30 and 74,285.64 is: 102,492.95
Step by Step Solution
- Step 1: Write the proportion equation
128,737.76 : 177,621.30 = 74,285.64 : x - Step 2: Convert to fraction form
128,737.76/177,621.30 = 74,285.64/x - Step 3: Cross multiply
128,737.76x = 177,621.30 × 74,285.64 - Step 4: Simplify right side
128,737.76x = 13,194,711,948.13 - Step 5: Solve for x
x = 13,194,711,948.13/128,737.76 - Step 6: Final answer
x = 102,492.95
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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.