Finding the Fourth Proportional to 217,178.64, 299,715.12 and 121,686.12
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Solution
The fourth proportional to 217,178.64, 299,715.12 and 121,686.12 is: 167,931.66
Step by Step Solution
- Step 1: Write the proportion equation
217,178.64 : 299,715.12 = 121,686.12 : x - Step 2: Convert to fraction form
217,178.64/299,715.12 = 121,686.12/x - Step 3: Cross multiply
217,178.64x = 299,715.12 × 121,686.12 - Step 4: Simplify right side
217,178.64x = 36,471,170,058.13 - Step 5: Solve for x
x = 36,471,170,058.13/217,178.64 - Step 6: Final answer
x = 167,931.66
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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.