Finding the Fourth Proportional to 80,938.68, 121,411.65 and 30,349.68
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Solution
The fourth proportional to 80,938.68, 121,411.65 and 30,349.68 is: 45,525.88
Step by Step Solution
- Step 1: Write the proportion equation
80,938.68 : 121,411.65 = 30,349.68 : x - Step 2: Convert to fraction form
80,938.68/121,411.65 = 30,349.68/x - Step 3: Cross multiply
80,938.68x = 121,411.65 × 30,349.68 - Step 4: Simplify right side
80,938.68x = 3,684,804,725.77 - Step 5: Solve for x
x = 3,684,804,725.77/80,938.68 - Step 6: Final answer
x = 45,525.88
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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.