Finding the Fourth Proportional to 102,878.30, 141,968.80 and 57,557.08
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Solution
The fourth proportional to 102,878.30, 141,968.80 and 57,557.08 is: 79,426.95
Step by Step Solution
- Step 1: Write the proportion equation
102,878.30 : 141,968.80 = 57,557.08 : x - Step 2: Convert to fraction form
102,878.30/141,968.80 = 57,557.08/x - Step 3: Cross multiply
102,878.30x = 141,968.80 × 57,557.08 - Step 4: Simplify right side
102,878.30x = 8,171,309,828.51 - Step 5: Solve for x
x = 8,171,309,828.51/102,878.30 - Step 6: Final answer
x = 79,426.95
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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.