Finding the Fourth Proportional to 143,397.36, 197,889.12 and 79,735.68
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Solution
The fourth proportional to 143,397.36, 197,889.12 and 79,735.68 is: 110,035.66
Step by Step Solution
- Step 1: Write the proportion equation
143,397.36 : 197,889.12 = 79,735.68 : x - Step 2: Convert to fraction form
143,397.36/197,889.12 = 79,735.68/x - Step 3: Cross multiply
143,397.36x = 197,889.12 × 79,735.68 - Step 4: Simplify right side
143,397.36x = 15,778,823,547.80 - Step 5: Solve for x
x = 15,778,823,547.80/143,397.36 - Step 6: Final answer
x = 110,035.66
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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.