Finding the Fourth Proportional to 128,541.30, 192,725.55 and 68,579.70
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Solution
The fourth proportional to 128,541.30, 192,725.55 and 68,579.70 is: 102,823.45
Step by Step Solution
- Step 1: Write the proportion equation
128,541.30 : 192,725.55 = 68,579.70 : x - Step 2: Convert to fraction form
128,541.30/192,725.55 = 68,579.70/x - Step 3: Cross multiply
128,541.30x = 192,725.55 × 68,579.70 - Step 4: Simplify right side
128,541.30x = 13,217,060,401.34 - Step 5: Solve for x
x = 13,217,060,401.34/128,541.30 - Step 6: Final answer
x = 102,823.45
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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.