Finding the Fourth Proportional to 128,317.47, 177,079.26 and 70,960.68
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Solution
The fourth proportional to 128,317.47, 177,079.26 and 70,960.68 is: 97,926.38
Step by Step Solution
- Step 1: Write the proportion equation
128,317.47 : 177,079.26 = 70,960.68 : x - Step 2: Convert to fraction form
128,317.47/177,079.26 = 70,960.68/x - Step 3: Cross multiply
128,317.47x = 177,079.26 × 70,960.68 - Step 4: Simplify right side
128,317.47x = 12,565,664,421.22 - Step 5: Solve for x
x = 12,565,664,421.22/128,317.47 - Step 6: Final answer
x = 97,926.38
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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.