Finding the Fourth Proportional to 128,369.51, 177,090.27 and 83,062.09
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Solution
The fourth proportional to 128,369.51, 177,090.27 and 83,062.09 is: 114,587.09
Step by Step Solution
- Step 1: Write the proportion equation
128,369.51 : 177,090.27 = 83,062.09 : x - Step 2: Convert to fraction form
128,369.51/177,090.27 = 83,062.09/x - Step 3: Cross multiply
128,369.51x = 177,090.27 × 83,062.09 - Step 4: Simplify right side
128,369.51x = 14,709,487,854.74 - Step 5: Solve for x
x = 14,709,487,854.74/128,369.51 - Step 6: Final answer
x = 114,587.09
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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.