Finding the Fourth Proportional to 101,129.75, 139,559.12 and 56,417.75
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Solution
The fourth proportional to 101,129.75, 139,559.12 and 56,417.75 is: 77,856.53
Step by Step Solution
- Step 1: Write the proportion equation
101,129.75 : 139,559.12 = 56,417.75 : x - Step 2: Convert to fraction form
101,129.75/139,559.12 = 56,417.75/x - Step 3: Cross multiply
101,129.75x = 139,559.12 × 56,417.75 - Step 4: Simplify right side
101,129.75x = 7,873,611,260.29 - Step 5: Solve for x
x = 7,873,611,260.29/101,129.75 - Step 6: Final answer
x = 77,856.53
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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.