Finding the Fourth Proportional to 101,355.68, 139,869.84 and 56,643.68
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Solution
The fourth proportional to 101,355.68, 139,869.84 and 56,643.68 is: 78,167.72
Step by Step Solution
- Step 1: Write the proportion equation
101,355.68 : 139,869.84 = 56,643.68 : x - Step 2: Convert to fraction form
101,355.68/139,869.84 = 56,643.68/x - Step 3: Cross multiply
101,355.68x = 139,869.84 × 56,643.68 - Step 4: Simplify right side
101,355.68x = 7,922,742,458.61 - Step 5: Solve for x
x = 7,922,742,458.61/101,355.68 - Step 6: Final answer
x = 78,167.72
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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.