Finding the Fourth Proportional to 138,611,756.68, 191,285,735.88 and 76,733,128.60
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Solution
The fourth proportional to 138,611,756.68, 191,285,735.88 and 76,733,128.60 is: 105,892,554.30
Step by Step Solution
- Step 1: Write the proportion equation
138,611,756.68 : 191,285,735.88 = 76,733,128.60 : x - Step 2: Convert to fraction form
138,611,756.68/191,285,735.88 = 76,733,128.60/x - Step 3: Cross multiply
138,611,756.68x = 191,285,735.88 × 76,733,128.60 - Step 4: Simplify right side
138,611,756.68x = 14,677,952,970,912,056 - Step 5: Solve for x
x = 14,677,952,970,912,056/138,611,756.68 - Step 6: Final answer
x = 105,892,554.30
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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.