Finding the Fourth Proportional to 158,417.13, 218,809.86 and 128,236.53
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Solution
The fourth proportional to 158,417.13, 218,809.86 and 128,236.53 is: 177,123.63
Step by Step Solution
- Step 1: Write the proportion equation
158,417.13 : 218,809.86 = 128,236.53 : x - Step 2: Convert to fraction form
158,417.13/218,809.86 = 128,236.53/x - Step 3: Cross multiply
158,417.13x = 218,809.86 × 128,236.53 - Step 4: Simplify right side
158,417.13x = 28,059,417,176.19 - Step 5: Solve for x
x = 28,059,417,176.19/158,417.13 - Step 6: Final answer
x = 177,123.63
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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.