Finding the Fourth Proportional to 121,789,219.20, 182,683,828.80 and 57,219,137.70
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Solution
The fourth proportional to 121,789,219.20, 182,683,828.80 and 57,219,137.70 is: 85,828,706.55
Step by Step Solution
- Step 1: Write the proportion equation
121,789,219.20 : 182,683,828.80 = 57,219,137.70 : x - Step 2: Convert to fraction form
121,789,219.20/182,683,828.80 = 57,219,137.70/x - Step 3: Cross multiply
121,789,219.20x = 182,683,828.80 × 57,219,137.70 - Step 4: Simplify right side
121,789,219.20x = 10,453,011,155,670,426 - Step 5: Solve for x
x = 10,453,011,155,670,426/121,789,219.20 - Step 6: Final answer
x = 85,828,706.55
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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.