Finding the Fourth Proportional to 138,438.30, 207,657.45 and 91,199.10
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Solution
The fourth proportional to 138,438.30, 207,657.45 and 91,199.10 is: 136,798.65
Step by Step Solution
- Step 1: Write the proportion equation
138,438.30 : 207,657.45 = 91,199.10 : x - Step 2: Convert to fraction form
138,438.30/207,657.45 = 91,199.10/x - Step 3: Cross multiply
138,438.30x = 207,657.45 × 91,199.10 - Step 4: Simplify right side
138,438.30x = 18,938,172,548.30 - Step 5: Solve for x
x = 18,938,172,548.30/138,438.30 - Step 6: Final answer
x = 136,798.65
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1.5x scale
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.