Finding the Fourth Proportional to 128,005.27, 176,646.08 and 70,645.12
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Solution
The fourth proportional to 128,005.27, 176,646.08 and 70,645.12 is: 97,489.61
Step by Step Solution
- Step 1: Write the proportion equation
128,005.27 : 176,646.08 = 70,645.12 : x - Step 2: Convert to fraction form
128,005.27/176,646.08 = 70,645.12/x - Step 3: Cross multiply
128,005.27x = 176,646.08 × 70,645.12 - Step 4: Simplify right side
128,005.27x = 12,479,183,254.13 - Step 5: Solve for x
x = 12,479,183,254.13/128,005.27 - Step 6: Final answer
x = 97,489.61
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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.