Finding the Fourth Proportional to 129,214.98, 178,332.64 and 78,229.63
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Solution
The fourth proportional to 129,214.98, 178,332.64 and 78,229.63 is: 107,966.56
Step by Step Solution
- Step 1: Write the proportion equation
129,214.98 : 178,332.64 = 78,229.63 : x - Step 2: Convert to fraction form
129,214.98/178,332.64 = 78,229.63/x - Step 3: Cross multiply
129,214.98x = 178,332.64 × 78,229.63 - Step 4: Simplify right side
129,214.98x = 13,950,896,471.46 - Step 5: Solve for x
x = 13,950,896,471.46/129,214.98 - Step 6: Final answer
x = 107,966.56
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1.5x scale
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.