Finding the Fourth Proportional to 122,960,414.88, 169,763,631.12 and 76,618,749.60
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Solution
The fourth proportional to 122,960,414.88, 169,763,631.12 and 76,618,749.60 is: 105,782,638.72
Step by Step Solution
- Step 1: Write the proportion equation
122,960,414.88 : 169,763,631.12 = 76,618,749.60 : x - Step 2: Convert to fraction form
122,960,414.88/169,763,631.12 = 76,618,749.60/x - Step 3: Cross multiply
122,960,414.88x = 169,763,631.12 × 76,618,749.60 - Step 4: Simplify right side
122,960,414.88x = 13,007,077,143,970,046 - Step 5: Solve for x
x = 13,007,077,143,970,046/122,960,414.88 - Step 6: Final answer
x = 105,782,638.72
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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.