Finding the Fourth Proportional to 121,203.36, 167,104.28 and 99,318.28
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Solution
The fourth proportional to 121,203.36, 167,104.28 and 99,318.28 is: 136,931.10
Step by Step Solution
- Step 1: Write the proportion equation
121,203.36 : 167,104.28 = 99,318.28 : x - Step 2: Convert to fraction form
121,203.36/167,104.28 = 99,318.28/x - Step 3: Cross multiply
121,203.36x = 167,104.28 × 99,318.28 - Step 4: Simplify right side
121,203.36x = 16,596,509,670.24 - Step 5: Solve for x
x = 16,596,509,670.24/121,203.36 - Step 6: Final answer
x = 136,931.10
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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.