Finding the Fourth Proportional to 101,438.87, 139,989.75 and 56,116.07
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Solution
The fourth proportional to 101,438.87, 139,989.75 and 56,116.07 is: 77,442.45
Step by Step Solution
- Step 1: Write the proportion equation
101,438.87 : 139,989.75 = 56,116.07 : x - Step 2: Convert to fraction form
101,438.87/139,989.75 = 56,116.07/x - Step 3: Cross multiply
101,438.87x = 139,989.75 × 56,116.07 - Step 4: Simplify right side
101,438.87x = 7,855,673,910.33 - Step 5: Solve for x
x = 7,855,673,910.33/101,438.87 - Step 6: Final answer
x = 77,442.45
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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.