Finding the Fourth Proportional to 81,493,434.90, 122,198,161.95 and 30,349,127.70
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Solution
The fourth proportional to 81,493,434.90, 122,198,161.95 and 30,349,127.70 is: 45,508,053.82
Step by Step Solution
- Step 1: Write the proportion equation
81,493,434.90 : 122,198,161.95 = 30,349,127.70 : x - Step 2: Convert to fraction form
81,493,434.90/122,198,161.95 = 30,349,127.70/x - Step 3: Cross multiply
81,493,434.90x = 122,198,161.95 × 30,349,127.70 - Step 4: Simplify right side
81,493,434.90x = 3,708,607,621,725,831 - Step 5: Solve for x
x = 3,708,607,621,725,831/81,493,434.90 - Step 6: Final answer
x = 45,508,053.82
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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.