Finding the Fourth Proportional to 80,457,686.65, 120,686,529.98 and 19,873,412.65
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Solution
The fourth proportional to 80,457,686.65, 120,686,529.98 and 19,873,412.65 is: 29,810,118.98
Step by Step Solution
- Step 1: Write the proportion equation
80,457,686.65 : 120,686,529.98 = 19,873,412.65 : x - Step 2: Convert to fraction form
80,457,686.65/120,686,529.98 = 19,873,412.65/x - Step 3: Cross multiply
80,457,686.65x = 120,686,529.98 × 19,873,412.65 - Step 4: Simplify right side
80,457,686.65x = 2,398,453,211,589,136 - Step 5: Solve for x
x = 2,398,453,211,589,136/80,457,686.65 - Step 6: Final answer
x = 29,810,118.98
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.