Finding the Fourth Proportional to 138,435.84, 191,041.50 and 74,773.62
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Solution
The fourth proportional to 138,435.84, 191,041.50 and 74,773.62 is: 103,187.62
Step by Step Solution
- Step 1: Write the proportion equation
138,435.84 : 191,041.50 = 74,773.62 : x - Step 2: Convert to fraction form
138,435.84/191,041.50 = 74,773.62/x - Step 3: Cross multiply
138,435.84x = 191,041.50 × 74,773.62 - Step 4: Simplify right side
138,435.84x = 14,284,864,525.23 - Step 5: Solve for x
x = 14,284,864,525.23/138,435.84 - Step 6: Final answer
x = 103,187.62
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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.