Finding the Fourth Proportional to 81,216.95, 121,822.65 and 28,625.09
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Solution
The fourth proportional to 81,216.95, 121,822.65 and 28,625.09 is: 42,936.65
Step by Step Solution
- Step 1: Write the proportion equation
81,216.95 : 121,822.65 = 28,625.09 : x - Step 2: Convert to fraction form
81,216.95/121,822.65 = 28,625.09/x - Step 3: Cross multiply
81,216.95x = 121,822.65 × 28,625.09 - Step 4: Simplify right side
81,216.95x = 3,487,183,711.18 - Step 5: Solve for x
x = 3,487,183,711.18/81,216.95 - Step 6: Final answer
x = 42,936.65
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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.