Finding the Fourth Proportional to 128,966,715.42, 177,972,295.68 and 73,211,649.30
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Solution
The fourth proportional to 128,966,715.42, 177,972,295.68 and 73,211,649.30 is: 101,031,070.33
Step by Step Solution
- Step 1: Write the proportion equation
128,966,715.42 : 177,972,295.68 = 73,211,649.30 : x - Step 2: Convert to fraction form
128,966,715.42/177,972,295.68 = 73,211,649.30/x - Step 3: Cross multiply
128,966,715.42x = 177,972,295.68 × 73,211,649.30 - Step 4: Simplify right side
128,966,715.42x = 13,029,645,296,440,066 - Step 5: Solve for x
x = 13,029,645,296,440,066/128,966,715.42 - Step 6: Final answer
x = 101,031,070.33
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.