Finding the Fourth Proportional to 138,459.49, 191,073.86 and 74,797.09
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Solution
The fourth proportional to 138,459.49, 191,073.86 and 74,797.09 is: 103,219.85
Step by Step Solution
- Step 1: Write the proportion equation
138,459.49 : 191,073.86 = 74,797.09 : x - Step 2: Convert to fraction form
138,459.49/191,073.86 = 74,797.09/x - Step 3: Cross multiply
138,459.49x = 191,073.86 × 74,797.09 - Step 4: Simplify right side
138,459.49x = 14,291,768,329.08 - Step 5: Solve for x
x = 14,291,768,329.08/138,459.49 - Step 6: Final answer
x = 103,219.85
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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.