Finding the Fourth Proportional to 128,930.76, 177,927.50 and 72,346.32
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Solution
The fourth proportional to 128,930.76, 177,927.50 and 72,346.32 is: 99,839.63
Step by Step Solution
- Step 1: Write the proportion equation
128,930.76 : 177,927.50 = 72,346.32 : x - Step 2: Convert to fraction form
128,930.76/177,927.50 = 72,346.32/x - Step 3: Cross multiply
128,930.76x = 177,927.50 × 72,346.32 - Step 4: Simplify right side
128,930.76x = 12,872,399,851.80 - Step 5: Solve for x
x = 12,872,399,851.80/128,930.76 - Step 6: Final answer
x = 99,839.63
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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.