Finding the Fourth Proportional to 128,848.13, 177,804.40 and 71,486.85
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Solution
The fourth proportional to 128,848.13, 177,804.40 and 71,486.85 is: 98,648.50
Step by Step Solution
- Step 1: Write the proportion equation
128,848.13 : 177,804.40 = 71,486.85 : x - Step 2: Convert to fraction form
128,848.13/177,804.40 = 71,486.85/x - Step 3: Cross multiply
128,848.13x = 177,804.40 × 71,486.85 - Step 4: Simplify right side
128,848.13x = 12,710,675,594.00 - Step 5: Solve for x
x = 12,710,675,594.00/128,848.13 - Step 6: Final answer
x = 98,648.50
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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.