Finding the Fourth Proportional to 128,590.39, 177,413.70 and 83,303.08
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Solution
The fourth proportional to 128,590.39, 177,413.70 and 83,303.08 is: 114,931.67
Step by Step Solution
- Step 1: Write the proportion equation
128,590.39 : 177,413.70 = 83,303.08 : x - Step 2: Convert to fraction form
128,590.39/177,413.70 = 83,303.08/x - Step 3: Cross multiply
128,590.39x = 177,413.70 × 83,303.08 - Step 4: Simplify right side
128,590.39x = 14,779,107,644.20 - Step 5: Solve for x
x = 14,779,107,644.20/128,590.39 - Step 6: Final answer
x = 114,931.67
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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.