Finding the Fourth Proportional to 128,641.48, 177,527.10 and 74,925.08
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Solution
The fourth proportional to 128,641.48, 177,527.10 and 74,925.08 is: 103,397.69
Step by Step Solution
- Step 1: Write the proportion equation
128,641.48 : 177,527.10 = 74,925.08 : x - Step 2: Convert to fraction form
128,641.48/177,527.10 = 74,925.08/x - Step 3: Cross multiply
128,641.48x = 177,527.10 × 74,925.08 - Step 4: Simplify right side
128,641.48x = 13,301,232,169.67 - Step 5: Solve for x
x = 13,301,232,169.67/128,641.48 - Step 6: Final answer
x = 103,397.69
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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.