Finding the Fourth Proportional to 128,176.95, 192,248.84 and 39,428.49
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Solution
The fourth proportional to 128,176.95, 192,248.84 and 39,428.49 is: 59,137.63
Step by Step Solution
- Step 1: Write the proportion equation
128,176.95 : 192,248.84 = 39,428.49 : x - Step 2: Convert to fraction form
128,176.95/192,248.84 = 39,428.49/x - Step 3: Cross multiply
128,176.95x = 192,248.84 × 39,428.49 - Step 4: Simplify right side
128,176.95x = 7,580,081,268.31 - Step 5: Solve for x
x = 7,580,081,268.31/128,176.95 - Step 6: Final answer
x = 59,137.63
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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.