Finding the Fourth Proportional to 128,398.63, 177,246.86 and 76,733.95
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Solution
The fourth proportional to 128,398.63, 177,246.86 and 76,733.95 is: 105,926.77
Step by Step Solution
- Step 1: Write the proportion equation
128,398.63 : 177,246.86 = 76,733.95 : x - Step 2: Convert to fraction form
128,398.63/177,246.86 = 76,733.95/x - Step 3: Cross multiply
128,398.63x = 177,246.86 × 76,733.95 - Step 4: Simplify right side
128,398.63x = 13,600,851,788.14 - Step 5: Solve for x
x = 13,600,851,788.14/128,398.63 - Step 6: Final answer
x = 105,926.77
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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.