Finding the Fourth Proportional to 99,207.92, 136,909.34 and 56,780.12
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Solution
The fourth proportional to 99,207.92, 136,909.34 and 56,780.12 is: 78,357.95
Step by Step Solution
- Step 1: Write the proportion equation
99,207.92 : 136,909.34 = 56,780.12 : x - Step 2: Convert to fraction form
99,207.92/136,909.34 = 56,780.12/x - Step 3: Cross multiply
99,207.92x = 136,909.34 × 56,780.12 - Step 4: Simplify right side
99,207.92x = 7,773,728,754.32 - Step 5: Solve for x
x = 7,773,728,754.32/99,207.92 - Step 6: Final answer
x = 78,357.95
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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.