Finding the Fourth Proportional to 81,688.04, 112,709.68 and 47,677.08
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Solution
The fourth proportional to 81,688.04, 112,709.68 and 47,677.08 is: 65,782.81
Step by Step Solution
- Step 1: Write the proportion equation
81,688.04 : 112,709.68 = 47,677.08 : x - Step 2: Convert to fraction form
81,688.04/112,709.68 = 47,677.08/x - Step 3: Cross multiply
81,688.04x = 112,709.68 × 47,677.08 - Step 4: Simplify right side
81,688.04x = 5,373,668,430.13 - Step 5: Solve for x
x = 5,373,668,430.13/81,688.04 - Step 6: Final answer
x = 65,782.81
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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.