Finding the Fourth Proportional to 138,149,948.73, 190,732,968.30 and 87,942,496.21
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Solution
The fourth proportional to 138,149,948.73, 190,732,968.30 and 87,942,496.21 is: 121,415,414.89
Step by Step Solution
- Step 1: Write the proportion equation
138,149,948.73 : 190,732,968.30 = 87,942,496.21 : x - Step 2: Convert to fraction form
138,149,948.73/190,732,968.30 = 87,942,496.21/x - Step 3: Cross multiply
138,149,948.73x = 190,732,968.30 × 87,942,496.21 - Step 4: Simplify right side
138,149,948.73x = 16,773,533,341,844,800 - Step 5: Solve for x
x = 16,773,533,341,844,800/138,149,948.73 - Step 6: Final answer
x = 121,415,414.89
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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.