Finding the Fourth Proportional to 142,913.40, 197,221.68 and 79,252.08
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Solution
The fourth proportional to 142,913.40, 197,221.68 and 79,252.08 is: 109,368.53
Step by Step Solution
- Step 1: Write the proportion equation
142,913.40 : 197,221.68 = 79,252.08 : x - Step 2: Convert to fraction form
142,913.40/197,221.68 = 79,252.08/x - Step 3: Cross multiply
142,913.40x = 197,221.68 × 79,252.08 - Step 4: Simplify right side
142,913.40x = 15,630,228,361.09 - Step 5: Solve for x
x = 15,630,228,361.09/142,913.40 - Step 6: Final answer
x = 109,368.53
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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.