Finding the Fourth Proportional to 128,102.31, 176,840.82 and 74,376.63
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Solution
The fourth proportional to 128,102.31, 176,840.82 and 74,376.63 is: 102,674.37
Step by Step Solution
- Step 1: Write the proportion equation
128,102.31 : 176,840.82 = 74,376.63 : x - Step 2: Convert to fraction form
128,102.31/176,840.82 = 74,376.63/x - Step 3: Cross multiply
128,102.31x = 176,840.82 × 74,376.63 - Step 4: Simplify right side
128,102.31x = 13,152,824,238.04 - Step 5: Solve for x
x = 13,152,824,238.04/128,102.31 - Step 6: Final answer
x = 102,674.37
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.