Finding the Fourth Proportional to 121,780,345.18, 168,060,420.84 and 68,855,915.96
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Solution
The fourth proportional to 121,780,345.18, 168,060,420.84 and 68,855,915.96 is: 95,023,168.12
Step by Step Solution
- Step 1: Write the proportion equation
121,780,345.18 : 168,060,420.84 = 68,855,915.96 : x - Step 2: Convert to fraction form
121,780,345.18/168,060,420.84 = 68,855,915.96/x - Step 3: Cross multiply
121,780,345.18x = 168,060,420.84 × 68,855,915.96 - Step 4: Simplify right side
121,780,345.18x = 11,571,954,213,372,946 - Step 5: Solve for x
x = 11,571,954,213,372,946/121,780,345.18 - Step 6: Final answer
x = 95,023,168.12
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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.