Finding the Fourth Proportional to 128,315,251.80, 192,472,877.70 and 77,296,915.80
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Solution
The fourth proportional to 128,315,251.80, 192,472,877.70 and 77,296,915.80 is: 115,945,373.70
Step by Step Solution
- Step 1: Write the proportion equation
128,315,251.80 : 192,472,877.70 = 77,296,915.80 : x - Step 2: Convert to fraction form
128,315,251.80/192,472,877.70 = 77,296,915.80/x - Step 3: Cross multiply
128,315,251.80x = 192,472,877.70 × 77,296,915.80 - Step 4: Simplify right side
128,315,251.80x = 14,877,559,821,360,596 - Step 5: Solve for x
x = 14,877,559,821,360,596/128,315,251.80 - Step 6: Final answer
x = 115,945,373.70
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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.