Finding the Fourth Proportional to 135,398.82, 186,860.90 and 74,975.09
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Solution
The fourth proportional to 135,398.82, 186,860.90 and 74,975.09 is: 103,471.45
Step by Step Solution
- Step 1: Write the proportion equation
135,398.82 : 186,860.90 = 74,975.09 : x - Step 2: Convert to fraction form
135,398.82/186,860.90 = 74,975.09/x - Step 3: Cross multiply
135,398.82x = 186,860.90 × 74,975.09 - Step 4: Simplify right side
135,398.82x = 14,009,912,794.98 - Step 5: Solve for x
x = 14,009,912,794.98/135,398.82 - Step 6: Final answer
x = 103,471.45
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1.5x scale
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.