Finding the Fourth Proportional to 128,808.24, 177,721.74 and 74,347.08
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Solution
The fourth proportional to 128,808.24, 177,721.74 and 74,347.08 is: 102,579.56
Step by Step Solution
- Step 1: Write the proportion equation
128,808.24 : 177,721.74 = 74,347.08 : x - Step 2: Convert to fraction form
128,808.24/177,721.74 = 74,347.08/x - Step 3: Cross multiply
128,808.24x = 177,721.74 × 74,347.08 - Step 4: Simplify right side
128,808.24x = 13,213,092,421.52 - Step 5: Solve for x
x = 13,213,092,421.52/128,808.24 - Step 6: Final answer
x = 102,579.56
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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.