Finding the Fourth Proportional to 81,208.12, 121,795.44 and 31,271.08
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Solution
The fourth proportional to 81,208.12, 121,795.44 and 31,271.08 is: 46,900.17
Step by Step Solution
- Step 1: Write the proportion equation
81,208.12 : 121,795.44 = 31,271.08 : x - Step 2: Convert to fraction form
81,208.12/121,795.44 = 31,271.08/x - Step 3: Cross multiply
81,208.12x = 121,795.44 × 31,271.08 - Step 4: Simplify right side
81,208.12x = 3,808,674,947.88 - Step 5: Solve for x
x = 3,808,674,947.88/81,208.12 - Step 6: Final answer
x = 46,900.17
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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.