Finding the Fourth Proportional to 138,438.60, 207,629.55 and 38,573.70
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Solution
The fourth proportional to 138,438.60, 207,629.55 and 38,573.70 is: 57,852.65
Step by Step Solution
- Step 1: Write the proportion equation
138,438.60 : 207,629.55 = 38,573.70 : x - Step 2: Convert to fraction form
138,438.60/207,629.55 = 38,573.70/x - Step 3: Cross multiply
138,438.60x = 207,629.55 × 38,573.70 - Step 4: Simplify right side
138,438.60x = 8,009,039,972.84 - Step 5: Solve for x
x = 8,009,039,972.84/138,438.60 - Step 6: Final answer
x = 57,852.65
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.