Finding the Fourth Proportional to 143,296,757.20, 197,749,578.12 and 81,417,177.04
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Solution
The fourth proportional to 143,296,757.20, 197,749,578.12 and 81,417,177.04 is: 112,355,734.53
Step by Step Solution
- Step 1: Write the proportion equation
143,296,757.20 : 197,749,578.12 = 81,417,177.04 : x - Step 2: Convert to fraction form
143,296,757.20/197,749,578.12 = 81,417,177.04/x - Step 3: Cross multiply
143,296,757.20x = 197,749,578.12 × 81,417,177.04 - Step 4: Simplify right side
143,296,757.20x = 16,100,212,411,381,352 - Step 5: Solve for x
x = 16,100,212,411,381,352/143,296,757.20 - Step 6: Final answer
x = 112,355,734.53
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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.