Finding the Fourth Proportional to 81,909.05, 112,991.14 and 56,371.08
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Solution
The fourth proportional to 81,909.05, 112,991.14 and 56,371.08 is: 77,762.26
Step by Step Solution
- Step 1: Write the proportion equation
81,909.05 : 112,991.14 = 56,371.08 : x - Step 2: Convert to fraction form
81,909.05/112,991.14 = 56,371.08/x - Step 3: Cross multiply
81,909.05x = 112,991.14 × 56,371.08 - Step 4: Simplify right side
81,909.05x = 6,369,432,592.23 - Step 5: Solve for x
x = 6,369,432,592.23/81,909.05 - Step 6: Final answer
x = 77,762.26
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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.