Finding the Fourth Proportional to 101,439.08, 139,994.52 and 56,128.08
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Solution
The fourth proportional to 101,439.08, 139,994.52 and 56,128.08 is: 77,461.50
Step by Step Solution
- Step 1: Write the proportion equation
101,439.08 : 139,994.52 = 56,128.08 : x - Step 2: Convert to fraction form
101,439.08/139,994.52 = 56,128.08/x - Step 3: Cross multiply
101,439.08x = 139,994.52 × 56,128.08 - Step 4: Simplify right side
101,439.08x = 7,857,623,618.12 - Step 5: Solve for x
x = 7,857,623,618.12/101,439.08 - Step 6: Final answer
x = 77,461.50
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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.