Finding the Fourth Proportional to 129,948.64, 179,335.09 and 71,813.55
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Solution
The fourth proportional to 129,948.64, 179,335.09 and 71,813.55 is: 99,105.99
Step by Step Solution
- Step 1: Write the proportion equation
129,948.64 : 179,335.09 = 71,813.55 : x - Step 2: Convert to fraction form
129,948.64/179,335.09 = 71,813.55/x - Step 3: Cross multiply
129,948.64x = 179,335.09 × 71,813.55 - Step 4: Simplify right side
129,948.64x = 12,878,688,196.73 - Step 5: Solve for x
x = 12,878,688,196.73/129,948.64 - Step 6: Final answer
x = 99,105.99
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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.