Finding the Fourth Proportional to 128,933.17, 177,924.95 and 71,569.12
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Solution
The fourth proportional to 128,933.17, 177,924.95 and 71,569.12 is: 98,763.82
Step by Step Solution
- Step 1: Write the proportion equation
128,933.17 : 177,924.95 = 71,569.12 : x - Step 2: Convert to fraction form
128,933.17/177,924.95 = 71,569.12/x - Step 3: Cross multiply
128,933.17x = 177,924.95 × 71,569.12 - Step 4: Simplify right side
128,933.17x = 12,733,932,299.46 - Step 5: Solve for x
x = 12,733,932,299.46/128,933.17 - Step 6: Final answer
x = 98,763.82
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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.