Finding the Fourth Proportional to 128,009.28, 192,008.48 and 39,258.08
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Solution
The fourth proportional to 128,009.28, 192,008.48 and 39,258.08 is: 58,885.45
Step by Step Solution
- Step 1: Write the proportion equation
128,009.28 : 192,008.48 = 39,258.08 : x - Step 2: Convert to fraction form
128,009.28/192,008.48 = 39,258.08/x - Step 3: Cross multiply
128,009.28x = 192,008.48 × 39,258.08 - Step 4: Simplify right side
128,009.28x = 7,537,884,268.52 - Step 5: Solve for x
x = 7,537,884,268.52/128,009.28 - Step 6: Final answer
x = 58,885.45
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.