Finding the Fourth Proportional to 128,572.54, 177,438.27 and 71,987.02
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Solution
The fourth proportional to 128,572.54, 177,438.27 and 71,987.02 is: 99,346.66
Step by Step Solution
- Step 1: Write the proportion equation
128,572.54 : 177,438.27 = 71,987.02 : x - Step 2: Convert to fraction form
128,572.54/177,438.27 = 71,987.02/x - Step 3: Cross multiply
128,572.54x = 177,438.27 × 71,987.02 - Step 4: Simplify right side
128,572.54x = 12,773,252,291.26 - Step 5: Solve for x
x = 12,773,252,291.26/128,572.54 - Step 6: Final answer
x = 99,346.66
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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.