Finding the Fourth Proportional to 142,878.30, 197,177.67 and 79,223.10
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Solution
The fourth proportional to 142,878.30, 197,177.67 and 79,223.10 is: 109,330.99
Step by Step Solution
- Step 1: Write the proportion equation
142,878.30 : 197,177.67 = 79,223.10 : x - Step 2: Convert to fraction form
142,878.30/197,177.67 = 79,223.10/x - Step 3: Cross multiply
142,878.30x = 197,177.67 × 79,223.10 - Step 4: Simplify right side
142,878.30x = 15,621,026,268.18 - Step 5: Solve for x
x = 15,621,026,268.18/142,878.30 - Step 6: Final answer
x = 109,330.99
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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.