Finding the Fourth Proportional to 128,740.48, 177,672.80 and 75,029.92
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Solution
The fourth proportional to 128,740.48, 177,672.80 and 75,029.92 is: 103,547.66
Step by Step Solution
- Step 1: Write the proportion equation
128,740.48 : 177,672.80 = 75,029.92 : x - Step 2: Convert to fraction form
128,740.48/177,672.80 = 75,029.92/x - Step 3: Cross multiply
128,740.48x = 177,672.80 × 75,029.92 - Step 4: Simplify right side
128,740.48x = 13,330,775,970.18 - Step 5: Solve for x
x = 13,330,775,970.18/128,740.48 - Step 6: Final answer
x = 103,547.66
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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.