Finding the Fourth Proportional to 99,431.12, 137,215.18 and 54,109.08
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Solution
The fourth proportional to 99,431.12, 137,215.18 and 54,109.08 is: 74,670.66
Step by Step Solution
- Step 1: Write the proportion equation
99,431.12 : 137,215.18 = 54,109.08 : x - Step 2: Convert to fraction form
99,431.12/137,215.18 = 54,109.08/x - Step 3: Cross multiply
99,431.12x = 137,215.18 × 54,109.08 - Step 4: Simplify right side
99,431.12x = 7,424,587,151.83 - Step 5: Solve for x
x = 7,424,587,151.83/99,431.12 - Step 6: Final answer
x = 74,670.66
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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.