Finding the Fourth Proportional to 157,963.41, 217,989.51 and 86,343.71
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Solution
The fourth proportional to 157,963.41, 217,989.51 and 86,343.71 is: 119,154.32
Step by Step Solution
- Step 1: Write the proportion equation
157,963.41 : 217,989.51 = 86,343.71 : x - Step 2: Convert to fraction form
157,963.41/217,989.51 = 86,343.71/x - Step 3: Cross multiply
157,963.41x = 217,989.51 × 86,343.71 - Step 4: Simplify right side
157,963.41x = 18,822,023,034.48 - Step 5: Solve for x
x = 18,822,023,034.48/157,963.41 - Step 6: Final answer
x = 119,154.32
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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.