Finding the Fourth Proportional to 128,948.70, 193,423.05 and 84,711.90
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Solution
The fourth proportional to 128,948.70, 193,423.05 and 84,711.90 is: 127,067.85
Step by Step Solution
- Step 1: Write the proportion equation
128,948.70 : 193,423.05 = 84,711.90 : x - Step 2: Convert to fraction form
128,948.70/193,423.05 = 84,711.90/x - Step 3: Cross multiply
128,948.70x = 193,423.05 × 84,711.90 - Step 4: Simplify right side
128,948.70x = 16,385,234,069.30 - Step 5: Solve for x
x = 16,385,234,069.30/128,948.70 - Step 6: Final answer
x = 127,067.85
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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.