Finding the Fourth Proportional to 128,430.87, 177,270.22 and 74,726.26
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Solution
The fourth proportional to 128,430.87, 177,270.22 and 74,726.26 is: 103,142.96
Step by Step Solution
- Step 1: Write the proportion equation
128,430.87 : 177,270.22 = 74,726.26 : x - Step 2: Convert to fraction form
128,430.87/177,270.22 = 74,726.26/x - Step 3: Cross multiply
128,430.87x = 177,270.22 × 74,726.26 - Step 4: Simplify right side
128,430.87x = 13,246,740,549.98 - Step 5: Solve for x
x = 13,246,740,549.98/128,430.87 - Step 6: Final answer
x = 103,142.96
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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.